79873978 ÷ 799 
Our goal is to divide 79873978 by 799.

Advancing to step 1:
The number 799 fits into 7 0 times, leaving a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 7 to get 7.
Fetch the next digit (9) from the dividend, attach it to 7 and continue: 79 / 799

Going ahead to step 2:
If we divide 79 by 799, we get 0 and a remainder of 79.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 79 to get 79.
Append the next digit (8) from the dividend to 79 and continue with: 798 / 799

Going ahead to step 3:
When dividing 798 by 799, we get 0 with a remainder of 798.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 798 and we're left with 798.
Include the next digit (7) from the dividend after 798, then repeat: 7987 / 799

On to step 4:
The number 799 fits into 7987 9 times, leaving a remainder of 796.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we take 7191 away from 7987, we end up with 796.
Include the next digit (3) from the dividend after 796, then repeat: 7963 / 799

On to step 5:
When dividing 7963 by 799, we get 9 with a remainder of 772.
The number 9 becomes the next digit in our result. 
Result so far: 99.0
Subtract 7191 from 7963 to get 772.
Grab the next digit (9) from the dividend, add it to 772, then carry on: 7729 / 799

On to step 6:
When dividing 7729 by 799, we get 9 with a remainder of 538.
Record the quotient 9 as the next digit in the result. 
Result so far: 999.0
If we take 7191 away from 7729, we end up with 538.
Grab the next digit (7) from the dividend, add it to 538, then carry on: 5387 / 799

On to step 7:
When dividing 5387 by 799, we get 6 with a remainder of 593.
Write down 6 as next digit of the result. 
Result so far: 9996.0
If we subtract 4794 from 5387, we get 593.
Grab the next digit (8) from the dividend, add it to 593, then carry on: 5938 / 799

Let's proceed to step 8:
The number 799 fits into 5938 7 times, leaving a remainder of 345.
Put 7 as the next digit of the answer. 
Result so far: 99967.0
If we subtract 5593 from 5938, we get 345.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3450, and continue the process.

Moving on to step 9:
799 can be fit into 3450 4 times, resulting in a remainder of 254.
The number 4 becomes the next digit in our result. 
Result so far: 99967.4
The remainder is 254 after subtracting 3196 from 3450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Let's proceed to step 10:
799 goes into 2540 3 times with a remainder of 143.
The next digit of our result is 3. 
Result so far: 99967.43
If we take 2397 away from 2540, we end up with 143.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1430, and continue the process.

On to step 11:
The number 799 fits into 1430 1 times, leaving a remainder of 631.
Use 1 as the next digit of our solution. 
Result so far: 99967.431
Subtracting 799 from 1430 leaves us with 631.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6310, and continue the process.

Step 12:
799 can be fit into 6310 7 times, resulting in a remainder of 717.
The next digit of our result is 7. 
Result so far: 99967.4317
If we subtract 5593 from 6310, we get 717.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7170, and continue the process.

On to step 13:
When dividing 7170 by 799, we get 8 with a remainder of 778.
Use 8 as the next digit of our solution. 
Result so far: 99967.43178
Subtract 6392 from 7170 to get 778.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7780, and continue the process.

Moving on to step 14:
If we divide 7780 by 799, we get 9 and a remainder of 589.
Put 9 as the next digit of the answer. 
Result so far: 99967.431789
The remainder is 589 after subtracting 7191 from 7780.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5890, and continue the process.

Step 15:
799 can be fit into 5890 7 times, resulting in a remainder of 297.
Use 7 as the next digit of our solution. 
Result so far: 99967.4317897
If we subtract 5593 from 5890, we get 297.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2970, and continue the process.

Let's proceed to step 16:
When dividing 2970 by 799, we get 3 with a remainder of 573.
Write down 3 as next digit of the result. 
Result so far: 99967.43178973
The remainder is 573 after subtracting 2397 from 2970.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5730, and continue the process.

The final result is 99967.43178973 with a remainder of 5.73e-07.