15860308 ÷ 939 
We want to figure out the number of times 15860308 can be divided by 939.

Advancing to step 1:
When dividing 1 by 939, we get 0 with a remainder of 1.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 939

Let's proceed to step 2:
When dividing 15 by 939, we get 0 with a remainder of 15.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 15, we get 15.
Take the next digit (8) from the dividend and append it to 15, then repeat: 158 / 939

Advancing to step 3:
When dividing 158 by 939, we get 0 with a remainder of 158.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 158 to get 158.
Include the next digit (6) from the dividend after 158, then repeat: 1586 / 939

On to step 4:
When dividing 1586 by 939, we get 1 with a remainder of 647.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 939 from 1586, we get 647.
Bring next digit (0) of the dividend behind the 647 and repeat the process: 6470 / 939

Advancing to step 5:
If we divide 6470 by 939, we get 6 and a remainder of 836.
Record the quotient 6 as the next digit in the result. 
Result so far: 16.0
The remainder is 836 after subtracting 5634 from 6470.
Append the next digit (3) from the dividend to 836 and continue with: 8363 / 939

Step 6:
The number 939 fits into 8363 8 times, leaving a remainder of 851.
Write down 8 as next digit of the result. 
Result so far: 168.0
If we take 7512 away from 8363, we end up with 851.
Include the next digit (0) from the dividend after 851, then repeat: 8510 / 939

On to step 7:
When dividing 8510 by 939, we get 9 with a remainder of 59.
The number 9 becomes the next digit in our result. 
Result so far: 1689.0
Subtracting 8451 from 8510 leaves us with 59.
Include the next digit (8) from the dividend after 59, then repeat: 598 / 939

Going ahead to step 8:
The number 939 fits into 598 0 times, leaving a remainder of 598.
Record the quotient 0 as the next digit in the result. 
Result so far: 16890.0
Subtract 0 from 598 to get 598.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

Step 9:
939 can be fit into 5980 6 times, resulting in a remainder of 346.
The next digit of our result is 6. 
Result so far: 16890.6
The remainder is 346 after subtracting 5634 from 5980.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3460, and continue the process.

On to step 10:
If we divide 3460 by 939, we get 3 and a remainder of 643.
Record the quotient 3 as the next digit in the result. 
Result so far: 16890.63
If we take 2817 away from 3460, we end up with 643.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6430, and continue the process.

On to step 11:
939 can be fit into 6430 6 times, resulting in a remainder of 796.
Put 6 as the next digit of the answer. 
Result so far: 16890.636
If we take 5634 away from 6430, we end up with 796.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7960, and continue the process.

Let's proceed to step 12:
939 goes into 7960 8 times with a remainder of 448.
The number 8 becomes the next digit in our result. 
Result so far: 16890.6368
Deduct 7512 from 7960 and we're left with 448.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4480, and continue the process.

Going ahead to step 13:
The number 939 fits into 4480 4 times, leaving a remainder of 724.
Use 4 as the next digit of our solution. 
Result so far: 16890.63684
The remainder is 724 after subtracting 3756 from 4480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7240, and continue the process.

Let's proceed to step 14:
When dividing 7240 by 939, we get 7 with a remainder of 667.
Write down 7 as next digit of the result. 
Result so far: 16890.636847
If we take 6573 away from 7240, we end up with 667.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6670, and continue the process.

Moving on to step 15:
When dividing 6670 by 939, we get 7 with a remainder of 97.
The next digit of our result is 7. 
Result so far: 16890.6368477
If we take 6573 away from 6670, we end up with 97.
Since there are no more digits in the dividend, we add a zero to the remainder making it 970, and continue the process.

After the division, we end up with 16890.6368477 and a remainder of 9.7e-07.