81180421 divided by 521 
We want to divide 81180421 by 521.

On to step 1:
521 can be fit into 8 0 times, resulting in a remainder of 8.
Record the quotient 0 as the next digit in 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 / 521

Going ahead to step 2:
When dividing 81 by 521, we get 0 with a remainder of 81.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 81 after subtracting 0 from 81.
Grab the next digit (1) from the dividend, add it to 81, then carry on: 811 / 521

On to step 3:
The number 521 fits into 811 1 times, leaving a remainder of 290.
The next digit of our result is 1. 
Result so far: 1.0
Deduct 521 from 811 and we're left with 290.
Grab the next digit (8) from the dividend, add it to 290, then carry on: 2908 / 521

Advancing to step 4:
The number 521 fits into 2908 5 times, leaving a remainder of 303.
The number 5 becomes the next digit in our result. 
Result so far: 15.0
If we take 2605 away from 2908, we end up with 303.
Append the next digit (0) from the dividend to 303 and continue with: 3030 / 521

Moving on to step 5:
521 can be fit into 3030 5 times, resulting in a remainder of 425.
Write down 5 as next digit of the result. 
Result so far: 155.0
The remainder is 425 after subtracting 2605 from 3030.
Take the next digit (4) from the dividend and append it to 425, then repeat: 4254 / 521

Going ahead to step 6:
521 goes into 4254 8 times with a remainder of 86.
Write down 8 as next digit of the result. 
Result so far: 1558.0
If we subtract 4168 from 4254, we get 86.
Bring next digit (2) of the dividend behind the 86 and repeat the process: 862 / 521

On to step 7:
521 goes into 862 1 times with a remainder of 341.
The next digit of our result is 1. 
Result so far: 15581.0
If we subtract 521 from 862, we get 341.
Grab the next digit (1) from the dividend, add it to 341, then carry on: 3411 / 521

Let's proceed to step 8:
521 goes into 3411 6 times with a remainder of 285.
Record the quotient 6 as the next digit in the result. 
Result so far: 155816.0
The remainder is 285 after subtracting 3126 from 3411.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Moving on to step 9:
2850 divided by 521 is 5 with a remainder of 245.
The number 5 becomes the next digit in our result. 
Result so far: 155816.5
If we take 2605 away from 2850, we end up 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.

Let's proceed to step 10:
521 can be fit into 2450 4 times, resulting in a remainder of 366.
Put 4 as the next digit of the answer. 
Result so far: 155816.54
Deduct 2084 from 2450 and we're left with 366.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3660, and continue the process.

Moving on to step 11:
If we divide 3660 by 521, we get 7 and a remainder of 13.
The number 7 becomes the next digit in our result. 
Result so far: 155816.547
If we take 3647 away from 3660, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

On to step 12:
521 goes into 130 0 times with a remainder of 130.
Record the quotient 0 as the next digit in the result. 
Result so far: 155816.547
If we take 0 away from 130, we end up with 130.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1300, and continue the process.

Let's proceed to step 13:
If we divide 1300 by 521, we get 2 and a remainder of 258.
Record the quotient 2 as the next digit in the result. 
Result so far: 155816.54702
The remainder is 258 after subtracting 1042 from 1300.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2580, and continue the process.

Moving on to step 14:
The number 521 fits into 2580 4 times, leaving a remainder of 496.
Use 4 as the next digit of our solution. 
Result so far: 155816.547024
Subtracting 2084 from 2580 leaves us with 496.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4960, and continue the process.

Step 15:
When dividing 4960 by 521, we get 9 with a remainder of 271.
Use 9 as the next digit of our solution. 
Result so far: 155816.5470249
If we subtract 4689 from 4960, we get 271.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2710, and continue the process.

Going ahead to step 16:
521 can be fit into 2710 5 times, resulting in a remainder of 105.
Write down 5 as next digit of the result. 
Result so far: 155816.54702495
Deduct 2605 from 2710 and we're left with 105.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1050, and continue the process.

In conclusion, the division gives 155816.54702495 with a balance of 1.05e-07.