We divide 66687975 by 639
We want to figure out the number of times 66687975 can be divided by 639.

Advancing to step 1:
639 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 6, we end up with 6.
Fetch the next digit (6) from the dividend, attach it to 6 and continue: 66 / 639

Going ahead to step 2:
66 divided by 639 is 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 66, we get 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 639

Moving on to step 3:
If we divide 666 by 639, we get 1 and a remainder of 27.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 639 from 666, we get 27.
Bring next digit (8) of the dividend behind the 27 and repeat the process: 278 / 639

Let's proceed to step 4:
639 goes into 278 0 times with a remainder of 278.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
If we subtract 0 from 278, we get 278.
Grab the next digit (7) from the dividend, add it to 278, then carry on: 2787 / 639

Going ahead to step 5:
When dividing 2787 by 639, we get 4 with a remainder of 231.
The number 4 becomes the next digit in our result. 
Result so far: 104.0
If we take 2556 away from 2787, we end up with 231.
Take the next digit (9) from the dividend and append it to 231, then repeat: 2319 / 639

Moving on to step 6:
When dividing 2319 by 639, we get 3 with a remainder of 402.
The number 3 becomes the next digit in our result. 
Result so far: 1043.0
If we subtract 1917 from 2319, we get 402.
Fetch the next digit (7) from the dividend, attach it to 402 and continue: 4027 / 639

On to step 7:
If we divide 4027 by 639, we get 6 and a remainder of 193.
Write down 6 as next digit of the result. 
Result so far: 10436.0
If we take 3834 away from 4027, we end up with 193.
Grab the next digit (5) from the dividend, add it to 193, then carry on: 1935 / 639

Let's proceed to step 8:
639 can be fit into 1935 3 times, resulting in a remainder of 18.
The number 3 becomes the next digit in our result. 
Result so far: 104363.0
Subtracting 1917 from 1935 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Advancing to step 9:
If we divide 180 by 639, we get 0 and a remainder of 180.
Record the quotient 0 as the next digit in the result. 
Result so far: 104363.0
If we subtract 0 from 180, we get 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

On to step 10:
639 goes into 1800 2 times with a remainder of 522.
Put 2 as the next digit of the answer. 
Result so far: 104363.02
If we subtract 1278 from 1800, we get 522.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5220, and continue the process.

Advancing to step 11:
When dividing 5220 by 639, we get 8 with a remainder of 108.
Record the quotient 8 as the next digit in the result. 
Result so far: 104363.028
Subtracting 5112 from 5220 leaves us with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Step 12:
639 can be fit into 1080 1 times, resulting in a remainder of 441.
The number 1 becomes the next digit in our result. 
Result so far: 104363.0281
If we take 639 away from 1080, we end up with 441.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4410, and continue the process.

Advancing to step 13:
639 goes into 4410 6 times with a remainder of 576.
The number 6 becomes the next digit in our result. 
Result so far: 104363.02816
Subtracting 3834 from 4410 leaves us with 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Going ahead to step 14:
The number 639 fits into 5760 9 times, leaving a remainder of 9.
The number 9 becomes the next digit in our result. 
Result so far: 104363.028169
If we subtract 5751 from 5760, we get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

On to step 15:
639 can be fit into 90 0 times, resulting in a remainder of 90.
The next digit of our result is 0. 
Result so far: 104363.028169
Subtracting 0 from 90 leaves us with 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 900, and continue the process.

Advancing to step 16:
639 can be fit into 900 1 times, resulting in a remainder of 261.
Use 1 as the next digit of our solution. 
Result so far: 104363.02816901
Deduct 639 from 900 and we're left with 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Our division results in 104363.02816901 with a remaining 2.61e-07.