80842521 ÷ 815 
We want to figure out the number of times 80842521 can be divided by 815.

On to step 1:
The number 815 fits into 8 0 times, leaving a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 8, we end up with 8.
Append the next digit (0) from the dividend to 8 and continue with: 80 / 815

Step 2:
If we divide 80 by 815, we get 0 and a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Include the next digit (8) from the dividend after 80, then repeat: 808 / 815

On to step 3:
815 can be fit into 808 0 times, resulting in a remainder of 808.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 808, we get 808.
Fetch the next digit (4) from the dividend, attach it to 808 and continue: 8084 / 815

Let's proceed to step 4:
If we divide 8084 by 815, we get 9 and a remainder of 749.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we take 7335 away from 8084, we end up with 749.
Include the next digit (2) from the dividend after 749, then repeat: 7492 / 815

Moving on to step 5:
815 can be fit into 7492 9 times, resulting in a remainder of 157.
Record the quotient 9 as the next digit in the result. 
Result so far: 99.0
The remainder is 157 after subtracting 7335 from 7492.
Fetch the next digit (5) from the dividend, attach it to 157 and continue: 1575 / 815

Let's proceed to step 6:
1575 divided by 815 is 1 with a remainder of 760.
Put 1 as the next digit of the answer. 
Result so far: 991.0
The remainder is 760 after subtracting 815 from 1575.
Take the next digit (2) from the dividend and append it to 760, then repeat: 7602 / 815

Advancing to step 7:
When dividing 7602 by 815, we get 9 with a remainder of 267.
Put 9 as the next digit of the answer. 
Result so far: 9919.0
If we take 7335 away from 7602, we end up with 267.
Fetch the next digit (1) from the dividend, attach it to 267 and continue: 2671 / 815

Advancing to step 8:
815 can be fit into 2671 3 times, resulting in a remainder of 226.
Use 3 as the next digit of our solution. 
Result so far: 99193.0
Deduct 2445 from 2671 and we're left with 226.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2260, and continue the process.

Step 9:
2260 divided by 815 is 2 with a remainder of 630.
The number 2 becomes the next digit in our result. 
Result so far: 99193.2
If we subtract 1630 from 2260, we get 630.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6300, and continue the process.

Let's proceed to step 10:
815 goes into 6300 7 times with a remainder of 595.
Use 7 as the next digit of our solution. 
Result so far: 99193.27
Subtract 5705 from 6300 to get 595.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5950, and continue the process.

Moving on to step 11:
5950 divided by 815 is 7 with a remainder of 245.
Put 7 as the next digit of the answer. 
Result so far: 99193.277
Deduct 5705 from 5950 and we're left with 245.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2450, and continue the process.

Our division results in 99193.277 with a remaining 0.0245.