Let's divide 39864931 by 79
We're looking to find how many times 79 goes into 39864931.

Step 1:
If we divide 3 by 79, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Grab the next digit (9) from the dividend, add it to 3, then carry on: 39 / 79

Moving on to step 2:
79 can be fit into 39 0 times, resulting in a remainder of 39.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 39 and we're left with 39.
Bring next digit (8) of the dividend behind the 39 and repeat the process: 398 / 79

Advancing to step 3:
398 divided by 79 is 5 with a remainder of 3.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 395 away from 398, we end up with 3.
Include the next digit (6) from the dividend after 3, then repeat: 36 / 79

On to step 4:
When dividing 36 by 79, we get 0 with a remainder of 36.
Record the quotient 0 as the next digit in the result. 
Result so far: 50.0
Deduct 0 from 36 and we're left with 36.
Fetch the next digit (4) from the dividend, attach it to 36 and continue: 364 / 79

Going ahead to step 5:
79 goes into 364 4 times with a remainder of 48.
Use 4 as the next digit of our solution. 
Result so far: 504.0
Deduct 316 from 364 and we're left with 48.
Grab the next digit (9) from the dividend, add it to 48, then carry on: 489 / 79

Moving on to step 6:
When dividing 489 by 79, we get 6 with a remainder of 15.
Record the quotient 6 as the next digit in the result. 
Result so far: 5046.0
If we subtract 474 from 489, we get 15.
Take the next digit (3) from the dividend and append it to 15, then repeat: 153 / 79

Moving on to step 7:
When dividing 153 by 79, we get 1 with a remainder of 74.
The next digit of our result is 1. 
Result so far: 50461.0
If we take 79 away from 153, we end up with 74.
Append the next digit (1) from the dividend to 74 and continue with: 741 / 79

Step 8:
The number 79 fits into 741 9 times, leaving a remainder of 30.
The number 9 becomes the next digit in our result. 
Result so far: 504619.0
If we take 711 away from 741, we end up with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Advancing to step 9:
The number 79 fits into 300 3 times, leaving a remainder of 63.
Write down 3 as next digit of the result. 
Result so far: 504619.3
Subtracting 237 from 300 leaves us with 63.
Since there are no more digits in the dividend, we add a zero to the remainder making it 630, and continue the process.

Step 10:
When dividing 630 by 79, we get 7 with a remainder of 77.
Put 7 as the next digit of the answer. 
Result so far: 504619.37
If we take 553 away from 630, we end up with 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Let's proceed to step 11:
If we divide 770 by 79, we get 9 and a remainder of 59.
Write down 9 as next digit of the result. 
Result so far: 504619.379
If we subtract 711 from 770, we get 59.
Since there are no more digits in the dividend, we add a zero to the remainder making it 590, and continue the process.

On to step 12:
The number 79 fits into 590 7 times, leaving a remainder of 37.
The next digit of our result is 7. 
Result so far: 504619.3797
Subtract 553 from 590 to get 37.
Since there are no more digits in the dividend, we add a zero to the remainder making it 370, and continue the process.

Advancing to step 13:
79 goes into 370 4 times with a remainder of 54.
Use 4 as the next digit of our solution. 
Result so far: 504619.37974
Subtracting 316 from 370 leaves us with 54.
Since there are no more digits in the dividend, we add a zero to the remainder making it 540, and continue the process.

Step 14:
79 goes into 540 6 times with a remainder of 66.
The next digit of our result is 6. 
Result so far: 504619.379746
Subtract 474 from 540 to get 66.
Since there are no more digits in the dividend, we add a zero to the remainder making it 660, and continue the process.

Going ahead to step 15:
The number 79 fits into 660 8 times, leaving a remainder of 28.
The number 8 becomes the next digit in our result. 
Result so far: 504619.3797468
Deduct 632 from 660 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.

Going ahead to step 16:
79 can be fit into 280 3 times, resulting in a remainder of 43.
The next digit of our result is 3. 
Result so far: 504619.37974683
The remainder is 43 after subtracting 237 from 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 430, and continue the process.

After the division, we end up with 504619.37974683 and a remainder of 4.3e-08.