79987185 ÷ 998 
Our goal is to divide 79987185 by 998.

Step 1:
The number 998 fits into 7 0 times, leaving a remainder of 7.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 7, we end up with 7.
Grab the next digit (9) from the dividend, add it to 7, then carry on: 79 / 998

Advancing to step 2:
If we divide 79 by 998, we get 0 and a remainder of 79.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 79 to get 79.
Grab the next digit (9) from the dividend, add it to 79, then carry on: 799 / 998

On to step 3:
799 divided by 998 is 0 with a remainder of 799.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 799, we end up with 799.
Fetch the next digit (8) from the dividend, attach it to 799 and continue: 7998 / 998

Advancing to step 4:
When dividing 7998 by 998, we get 8 with a remainder of 14.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Deduct 7984 from 7998 and we're left with 14.
Append the next digit (7) from the dividend to 14 and continue with: 147 / 998

Going ahead to step 5:
The number 998 fits into 147 0 times, leaving a remainder of 147.
Write down 0 as next digit of the result. 
Result so far: 80.0
Subtract 0 from 147 to get 147.
Include the next digit (1) from the dividend after 147, then repeat: 1471 / 998

On to step 6:
If we divide 1471 by 998, we get 1 and a remainder of 473.
The next digit of our result is 1. 
Result so far: 801.0
If we take 998 away from 1471, we end up with 473.
Bring next digit (8) of the dividend behind the 473 and repeat the process: 4738 / 998

On to step 7:
4738 divided by 998 is 4 with a remainder of 746.
The number 4 becomes the next digit in our result. 
Result so far: 8014.0
The remainder is 746 after subtracting 3992 from 4738.
Take the next digit (5) from the dividend and append it to 746, then repeat: 7465 / 998

Let's proceed to step 8:
The number 998 fits into 7465 7 times, leaving a remainder of 479.
Write down 7 as next digit of the result. 
Result so far: 80147.0
The remainder is 479 after subtracting 6986 from 7465.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4790, and continue the process.

Step 9:
The number 998 fits into 4790 4 times, leaving a remainder of 798.
Record the quotient 4 as the next digit in the result. 
Result so far: 80147.4
If we take 3992 away from 4790, we end up with 798.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7980, and continue the process.

Going ahead to step 10:
The number 998 fits into 7980 7 times, leaving a remainder of 994.
The next digit of our result is 7. 
Result so far: 80147.47
Subtract 6986 from 7980 to get 994.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9940, and continue the process.

Let's proceed to step 11:
998 goes into 9940 9 times with a remainder of 958.
The next digit of our result is 9. 
Result so far: 80147.479
Subtract 8982 from 9940 to get 958.
Since there are no more digits in the dividend, we add a zero to the remainder making it 9580, and continue the process.

On to step 12:
9580 divided by 998 is 9 with a remainder of 598.
Put 9 as the next digit of the answer. 
Result so far: 80147.4799
Deduct 8982 from 9580 and we're left with 598.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

The final result is 80147.4799 with a remainder of 0.00598.