We're dividing 640009 by 39 
We want to figure out the number of times 640009 can be divided by 39.

On to step 1:
The number 39 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 39

Advancing to step 2:
39 goes into 64 1 times with a remainder of 25.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
If we take 39 away from 64, we end up with 25.
Fetch the next digit (0) from the dividend, attach it to 25 and continue: 250 / 39

Step 3:
39 goes into 250 6 times with a remainder of 16.
Use 6 as the next digit of our solution. 
Result so far: 16.0
The remainder is 16 after subtracting 234 from 250.
Append the next digit (0) from the dividend to 16 and continue with: 160 / 39

On to step 4:
If we divide 160 by 39, we get 4 and a remainder of 4.
The number 4 becomes the next digit in our result. 
Result so far: 164.0
Subtract 156 from 160 to get 4.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 39

Let's proceed to step 5:
39 can be fit into 40 1 times, resulting in a remainder of 1.
Record the quotient 1 as the next digit in the result. 
Result so far: 1641.0
The remainder is 1 after subtracting 39 from 40.
Fetch the next digit (9) from the dividend, attach it to 1 and continue: 19 / 39

Step 6:
39 goes into 19 0 times with a remainder of 19.
Put 0 as the next digit of the answer. 
Result so far: 16410.0
Subtracting 0 from 19 leaves us with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Step 7:
The number 39 fits into 190 4 times, leaving a remainder of 34.
Write down 4 as next digit of the result. 
Result so far: 16410.4
Subtracting 156 from 190 leaves us with 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Step 8:
39 can be fit into 340 8 times, resulting in a remainder of 28.
Use 8 as the next digit of our solution. 
Result so far: 16410.48
Deduct 312 from 340 and we're left with 28.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

Let's proceed to step 9:
The number 39 fits into 280 7 times, leaving a remainder of 7.
Record the quotient 7 as the next digit in the result. 
Result so far: 16410.487
Subtract 273 from 280 to get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 10:
70 divided by 39 is 1 with a remainder of 31.
Write down 1 as next digit of the result. 
Result so far: 16410.4871
The remainder is 31 after subtracting 39 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 310, and continue the process.

On to step 11:
When dividing 310 by 39, we get 7 with a remainder of 37.
Write down 7 as next digit of the result. 
Result so far: 16410.48717
Subtracting 273 from 310 leaves us with 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Let's proceed to step 12:
39 can be fit into 370 9 times, resulting in a remainder of 19.
The next digit of our result is 9. 
Result so far: 16410.487179
Subtract 351 from 370 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 13:
39 goes into 190 4 times with a remainder of 34.
Put 4 as the next digit of the answer. 
Result so far: 16410.4871794
Subtract 156 from 190 to get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

On to step 14:
39 can be fit into 340 8 times, resulting in a remainder of 28.
Record the quotient 8 as the next digit in the result. 
Result so far: 16410.48717948
The remainder is 28 after subtracting 312 from 340.
Since there are no more digits in the dividend, we add a zero to the remainder making it 280, and continue the process.

The quotient of the division is 16410.48717948, and the remainder is 2.8e-08.