78602439 ÷ 939 
Our goal is to divide 78602439 by 939.

Advancing to step 1:
When dividing 7 by 939, we get 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 939

Step 2:
78 divided by 939 is 0 with a remainder of 78.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 78 leaves us with 78.
Append the next digit (6) from the dividend to 78 and continue with: 786 / 939

Going ahead to step 3:
If we divide 786 by 939, we get 0 and a remainder of 786.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 786 after subtracting 0 from 786.
Bring next digit (0) of the dividend behind the 786 and repeat the process: 7860 / 939

Going ahead to step 4:
When dividing 7860 by 939, we get 8 with a remainder of 348.
Write down 8 as next digit of the result. 
Result so far: 8.0
Subtract 7512 from 7860 to get 348.
Append the next digit (2) from the dividend to 348 and continue with: 3482 / 939

Moving on to step 5:
939 can be fit into 3482 3 times, resulting in a remainder of 665.
Put 3 as the next digit of the answer. 
Result so far: 83.0
If we subtract 2817 from 3482, we get 665.
Grab the next digit (4) from the dividend, add it to 665, then carry on: 6654 / 939

Let's proceed to step 6:
6654 divided by 939 is 7 with a remainder of 81.
Write down 7 as next digit of the result. 
Result so far: 837.0
If we subtract 6573 from 6654, we get 81.
Append the next digit (3) from the dividend to 81 and continue with: 813 / 939

Going ahead to step 7:
The number 939 fits into 813 0 times, leaving a remainder of 813.
Use 0 as the next digit of our solution. 
Result so far: 8370.0
Deduct 0 from 813 and we're left with 813.
Include the next digit (9) from the dividend after 813, then repeat: 8139 / 939

Advancing to step 8:
8139 divided by 939 is 8 with a remainder of 627.
The next digit of our result is 8. 
Result so far: 83708.0
Subtract 7512 from 8139 to get 627.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6270, and continue the process.

Going ahead to step 9:
6270 divided by 939 is 6 with a remainder of 636.
The next digit of our result is 6. 
Result so far: 83708.6
Deduct 5634 from 6270 and we're left with 636.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6360, and continue the process.

Step 10:
939 goes into 6360 6 times with a remainder of 726.
Record the quotient 6 as the next digit in the result. 
Result so far: 83708.66
The remainder is 726 after subtracting 5634 from 6360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7260, and continue the process.

The quotient of the division is 83708.66, and the remainder is 0.726.