80116325 ÷ 81 
We want to figure out the number of times 80116325 can be divided by 81.

On to step 1:
If we divide 8 by 81, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 81

Step 2:
When dividing 80 by 81, we get 0 with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Bring next digit (1) of the dividend behind the 80 and repeat the process: 801 / 81

On to step 3:
When dividing 801 by 81, we get 9 with a remainder of 72.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we subtract 729 from 801, we get 72.
Take the next digit (1) from the dividend and append it to 72, then repeat: 721 / 81

On to step 4:
81 goes into 721 8 times with a remainder of 73.
Record the quotient 8 as the next digit in the result. 
Result so far: 98.0
Subtracting 648 from 721 leaves us with 73.
Fetch the next digit (6) from the dividend, attach it to 73 and continue: 736 / 81

Step 5:
81 can be fit into 736 9 times, resulting in a remainder of 7.
The number 9 becomes the next digit in our result. 
Result so far: 989.0
The remainder is 7 after subtracting 729 from 736.
Grab the next digit (3) from the dividend, add it to 7, then carry on: 73 / 81

Moving on to step 6:
81 can be fit into 73 0 times, resulting in a remainder of 73.
The next digit of our result is 0. 
Result so far: 9890.0
Deduct 0 from 73 and we're left with 73.
Fetch the next digit (2) from the dividend, attach it to 73 and continue: 732 / 81

Going ahead to step 7:
When dividing 732 by 81, we get 9 with a remainder of 3.
Use 9 as the next digit of our solution. 
Result so far: 98909.0
The remainder is 3 after subtracting 729 from 732.
Append the next digit (5) from the dividend to 3 and continue with: 35 / 81

Step 8:
The number 81 fits into 35 0 times, leaving a remainder of 35.
The number 0 becomes the next digit in our result. 
Result so far: 989090.0
The remainder is 35 after subtracting 0 from 35.
Since there are no more digits in the dividend, we add a zero to the remainder making it 350, and continue the process.

Advancing to step 9:
The number 81 fits into 350 4 times, leaving a remainder of 26.
The next digit of our result is 4. 
Result so far: 989090.4
The remainder is 26 after subtracting 324 from 350.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Advancing to step 10:
81 can be fit into 260 3 times, resulting in a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 989090.43
Subtract 243 from 260 to get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Advancing to step 11:
When dividing 170 by 81, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 989090.432
Subtract 162 from 170 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 12:
If we divide 80 by 81, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 989090.432
If we subtract 0 from 80, we get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Let's proceed to step 13:
81 goes into 800 9 times with a remainder of 71.
The next digit of our result is 9. 
Result so far: 989090.43209
Subtract 729 from 800 to get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Advancing to step 14:
81 can be fit into 710 8 times, resulting in a remainder of 62.
Record the quotient 8 as the next digit in the result. 
Result so far: 989090.432098
If we take 648 away from 710, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Advancing to step 15:
When dividing 620 by 81, we get 7 with a remainder of 53.
Put 7 as the next digit of the answer. 
Result so far: 989090.4320987
Subtracting 567 from 620 leaves us with 53.
Since there are no more digits in the dividend, we add a zero to the remainder making it 530, and continue the process.

Step 16:
When dividing 530 by 81, we get 6 with a remainder of 44.
The next digit of our result is 6. 
Result so far: 989090.43209876
If we take 486 away from 530, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

The quotient of the division is 989090.43209876, and the remainder is 4.4e-08.