12639585 ÷ 912 
We want to figure out the number of times 12639585 can be divided by 912.

Let's proceed to step 1:
912 can be fit into 1 0 times, resulting in a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 912

Let's proceed to step 2:
The number 912 fits into 12 0 times, leaving a remainder of 12.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 12 after subtracting 0 from 12.
Take the next digit (6) from the dividend and append it to 12, then repeat: 126 / 912

Moving on to step 3:
126 divided by 912 is 0 with a remainder of 126.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 126, we get 126.
Include the next digit (3) from the dividend after 126, then repeat: 1263 / 912

Moving on to step 4:
912 goes into 1263 1 times with a remainder of 351.
Use 1 as the next digit of our solution. 
Result so far: 1.0
The remainder is 351 after subtracting 912 from 1263.
Take the next digit (9) from the dividend and append it to 351, then repeat: 3519 / 912

Going ahead to step 5:
If we divide 3519 by 912, we get 3 and a remainder of 783.
The next digit of our result is 3. 
Result so far: 13.0
The remainder is 783 after subtracting 2736 from 3519.
Grab the next digit (5) from the dividend, add it to 783, then carry on: 7835 / 912

Going ahead to step 6:
When dividing 7835 by 912, we get 8 with a remainder of 539.
Put 8 as the next digit of the answer. 
Result so far: 138.0
Deduct 7296 from 7835 and we're left with 539.
Include the next digit (8) from the dividend after 539, then repeat: 5398 / 912

Step 7:
When dividing 5398 by 912, we get 5 with a remainder of 838.
Record the quotient 5 as the next digit in the result. 
Result so far: 1385.0
Subtract 4560 from 5398 to get 838.
Bring next digit (5) of the dividend behind the 838 and repeat the process: 8385 / 912

Advancing to step 8:
The number 912 fits into 8385 9 times, leaving a remainder of 177.
Put 9 as the next digit of the answer. 
Result so far: 13859.0
Subtracting 8208 from 8385 leaves us with 177.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1770, and continue the process.

Let's proceed to step 9:
If we divide 1770 by 912, we get 1 and a remainder of 858.
Record the quotient 1 as the next digit in the result. 
Result so far: 13859.1
Subtract 912 from 1770 to get 858.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8580, and continue the process.

Step 10:
When dividing 8580 by 912, we get 9 with a remainder of 372.
Put 9 as the next digit of the answer. 
Result so far: 13859.19
Subtract 8208 from 8580 to get 372.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3720, and continue the process.

Step 11:
3720 divided by 912 is 4 with a remainder of 72.
Write down 4 as next digit of the result. 
Result so far: 13859.194
If we take 3648 away from 3720, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 12:
912 goes into 720 0 times with a remainder of 720.
Put 0 as the next digit of the answer. 
Result so far: 13859.194
Subtract 0 from 720 to get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Advancing to step 13:
When dividing 7200 by 912, we get 7 with a remainder of 816.
The next digit of our result is 7. 
Result so far: 13859.19407
Subtract 6384 from 7200 to get 816.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8160, and continue the process.

Going ahead to step 14:
8160 divided by 912 is 8 with a remainder of 864.
Use 8 as the next digit of our solution. 
Result so far: 13859.194078
Deduct 7296 from 8160 and we're left with 864.
Since there are no more digits in the dividend, we add a zero to the remainder making it 8640, and continue the process.

On to step 15:
912 can be fit into 8640 9 times, resulting in a remainder of 432.
Put 9 as the next digit of the answer. 
Result so far: 13859.1940789
If we take 8208 away from 8640, we end up with 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Let's proceed to step 16:
When dividing 4320 by 912, we get 4 with a remainder of 672.
The next digit of our result is 4. 
Result so far: 13859.19407894
Deduct 3648 from 4320 and we're left with 672.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6720, and continue the process.

After the division, we end up with 13859.19407894 and a remainder of 6.72e-07.