We look at the division of 988599 by 80 
Let's see how many times 80 fits into 988599.

Step 1:
The number 80 fits into 9 0 times, leaving a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 80

Going ahead to step 2:
80 goes into 98 1 times with a remainder of 18.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 80 from 98, we get 18.
Take the next digit (8) from the dividend and append it to 18, then repeat: 188 / 80

On to step 3:
The number 80 fits into 188 2 times, leaving a remainder of 28.
Use 2 as the next digit of our solution. 
Result so far: 12.0
Subtracting 160 from 188 leaves us with 28.
Bring next digit (5) of the dividend behind the 28 and repeat the process: 285 / 80

Let's proceed to step 4:
When dividing 285 by 80, we get 3 with a remainder of 45.
Record the quotient 3 as the next digit in the result. 
Result so far: 123.0
Deduct 240 from 285 and we're left with 45.
Append the next digit (9) from the dividend to 45 and continue with: 459 / 80

Advancing to step 5:
When dividing 459 by 80, we get 5 with a remainder of 59.
The number 5 becomes the next digit in our result. 
Result so far: 1235.0
Subtract 400 from 459 to get 59.
Grab the next digit (9) from the dividend, add it to 59, then carry on: 599 / 80

Moving on to step 6:
If we divide 599 by 80, we get 7 and a remainder of 39.
Use 7 as the next digit of our solution. 
Result so far: 12357.0
If we take 560 away from 599, we end up with 39.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

On to step 7:
80 goes into 390 4 times with a remainder of 70.
The next digit of our result is 4. 
Result so far: 12357.4
The remainder is 70 after subtracting 320 from 390.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Advancing to step 8:
If we divide 700 by 80, we get 8 and a remainder of 60.
Put 8 as the next digit of the answer. 
Result so far: 12357.48
Deduct 640 from 700 and we're left with 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

Advancing to step 9:
If we divide 600 by 80, we get 7 and a remainder of 40.
Record the quotient 7 as the next digit in the result. 
Result so far: 12357.487
Deduct 560 from 600 and we're left with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 10:
When dividing 400 by 80, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 12357.4875
If we take 400 away from 400, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 11:
When dividing 0 by 80, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 12357.4875
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 12:
When dividing 0 by 80, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 12357.4875
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final result is 12357.4875 with a remainder of 0.0.