81215518 ÷ 843 
Our goal is to divide 81215518 by 843.

On to step 1:
843 can be fit into 8 0 times, resulting in a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 843

Step 2:
81 divided by 843 is 0 with a remainder of 81.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 81, we get 81.
Bring next digit (2) of the dividend behind the 81 and repeat the process: 812 / 843

Going ahead to step 3:
The number 843 fits into 812 0 times, leaving a remainder of 812.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 812 to get 812.
Take the next digit (1) from the dividend and append it to 812, then repeat: 8121 / 843

Let's proceed to step 4:
8121 divided by 843 is 9 with a remainder of 534.
The next digit of our result is 9. 
Result so far: 9.0
Subtracting 7587 from 8121 leaves us with 534.
Bring next digit (5) of the dividend behind the 534 and repeat the process: 5345 / 843

Advancing to step 5:
When dividing 5345 by 843, we get 6 with a remainder of 287.
Use 6 as the next digit of our solution. 
Result so far: 96.0
Deduct 5058 from 5345 and we're left with 287.
Include the next digit (5) from the dividend after 287, then repeat: 2875 / 843

Moving on to step 6:
If we divide 2875 by 843, we get 3 and a remainder of 346.
Record the quotient 3 as the next digit in the result. 
Result so far: 963.0
Subtracting 2529 from 2875 leaves us with 346.
Grab the next digit (1) from the dividend, add it to 346, then carry on: 3461 / 843

Going ahead to step 7:
843 can be fit into 3461 4 times, resulting in a remainder of 89.
The next digit of our result is 4. 
Result so far: 9634.0
The remainder is 89 after subtracting 3372 from 3461.
Append the next digit (8) from the dividend to 89 and continue with: 898 / 843

Advancing to step 8:
898 divided by 843 is 1 with a remainder of 55.
The next digit of our result is 1. 
Result so far: 96341.0
Deduct 843 from 898 and we're left with 55.
Since there are no more digits in the dividend, we add a zero to the remainder making it 550, and continue the process.

On to step 9:
843 can be fit into 550 0 times, resulting in a remainder of 550.
Write down 0 as next digit of the result. 
Result so far: 96341.0
The remainder is 550 after subtracting 0 from 550.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5500, and continue the process.

On to step 10:
When dividing 5500 by 843, we get 6 with a remainder of 442.
The number 6 becomes the next digit in our result. 
Result so far: 96341.06
Subtracting 5058 from 5500 leaves us with 442.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4420, and continue the process.

Step 11:
843 can be fit into 4420 5 times, resulting in a remainder of 205.
Put 5 as the next digit of the answer. 
Result so far: 96341.065
The remainder is 205 after subtracting 4215 from 4420.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2050, and continue the process.

Step 12:
2050 divided by 843 is 2 with a remainder of 364.
Put 2 as the next digit of the answer. 
Result so far: 96341.0652
Subtracting 1686 from 2050 leaves us with 364.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3640, and continue the process.

On to step 13:
843 can be fit into 3640 4 times, resulting in a remainder of 268.
Use 4 as the next digit of our solution. 
Result so far: 96341.06524
If we subtract 3372 from 3640, we get 268.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2680, and continue the process.

Let's proceed to step 14:
The number 843 fits into 2680 3 times, leaving a remainder of 151.
Write down 3 as next digit of the result. 
Result so far: 96341.065243
Subtracting 2529 from 2680 leaves us with 151.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1510, and continue the process.

Step 15:
1510 divided by 843 is 1 with a remainder of 667.
Put 1 as the next digit of the answer. 
Result so far: 96341.0652431
The remainder is 667 after subtracting 843 from 1510.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6670, and continue the process.

Let's proceed to step 16:
843 can be fit into 6670 7 times, resulting in a remainder of 769.
Put 7 as the next digit of the answer. 
Result so far: 96341.06524317
If we subtract 5901 from 6670, we get 769.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7690, and continue the process.

The final outcome is 96341.06524317, with a leftover of 7.69e-07.