87545917 ÷ 80 
Our goal is to divide 87545917 by 80.

Going ahead to step 1:
When dividing 8 by 80, we get 0 with a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 80

Let's proceed to step 2:
If we divide 87 by 80, we get 1 and a remainder of 7.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
Subtract 80 from 87 to get 7.
Append the next digit (5) from the dividend to 7 and continue with: 75 / 80

On to step 3:
The number 80 fits into 75 0 times, leaving a remainder of 75.
Use 0 as the next digit of our solution. 
Result so far: 10.0
Subtracting 0 from 75 leaves us with 75.
Take the next digit (4) from the dividend and append it to 75, then repeat: 754 / 80

Moving on to step 4:
If we divide 754 by 80, we get 9 and a remainder of 34.
Use 9 as the next digit of our solution. 
Result so far: 109.0
The remainder is 34 after subtracting 720 from 754.
Include the next digit (5) from the dividend after 34, then repeat: 345 / 80

Moving on to step 5:
The number 80 fits into 345 4 times, leaving a remainder of 25.
The next digit of our result is 4. 
Result so far: 1094.0
The remainder is 25 after subtracting 320 from 345.
Take the next digit (9) from the dividend and append it to 25, then repeat: 259 / 80

Going ahead to step 6:
80 can be fit into 259 3 times, resulting in a remainder of 19.
The number 3 becomes the next digit in our result. 
Result so far: 10943.0
If we take 240 away from 259, we end up with 19.
Include the next digit (1) from the dividend after 19, then repeat: 191 / 80

Advancing to step 7:
80 goes into 191 2 times with a remainder of 31.
Write down 2 as next digit of the result. 
Result so far: 109432.0
The remainder is 31 after subtracting 160 from 191.
Bring next digit (7) of the dividend behind the 31 and repeat the process: 317 / 80

Step 8:
317 divided by 80 is 3 with a remainder of 77.
Record the quotient 3 as the next digit in the result. 
Result so far: 1094323.0
Subtract 240 from 317 to get 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 9:
If we divide 770 by 80, we get 9 and a remainder of 50.
Record the quotient 9 as the next digit in the result. 
Result so far: 1094323.9
Subtract 720 from 770 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 10:
The number 80 fits into 500 6 times, leaving a remainder of 20.
Write down 6 as next digit of the result. 
Result so far: 1094323.96
If we take 480 away from 500, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
80 can be fit into 200 2 times, resulting in a remainder of 40.
Put 2 as the next digit of the answer. 
Result so far: 1094323.962
Subtracting 160 from 200 leaves us 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.

Going ahead to step 12:
80 goes into 400 5 times with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 1094323.9625
The remainder is 0 after subtracting 400 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 13:
0 divided by 80 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 1094323.9625
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 14:
80 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 1094323.9625
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 quotient of the division is 1094323.9625, and the remainder is 0.0.