We look at the division of 81215657 by 553 
We want to figure out the number of times 81215657 can be divided by 553.

On to step 1:
The number 553 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 553

Let's proceed to step 2:
553 goes into 81 0 times 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 / 553

On to step 3:
When dividing 812 by 553, we get 1 with a remainder of 259.
The next digit of our result is 1. 
Result so far: 1.0
If we take 553 away from 812, we end up with 259.
Take the next digit (1) from the dividend and append it to 259, then repeat: 2591 / 553

On to step 4:
2591 divided by 553 is 4 with a remainder of 379.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
Subtract 2212 from 2591 to get 379.
Append the next digit (5) from the dividend to 379 and continue with: 3795 / 553

On to step 5:
If we divide 3795 by 553, we get 6 and a remainder of 477.
Use 6 as the next digit of our solution. 
Result so far: 146.0
If we take 3318 away from 3795, we end up with 477.
Include the next digit (6) from the dividend after 477, then repeat: 4776 / 553

Step 6:
553 goes into 4776 8 times with a remainder of 352.
The number 8 becomes the next digit in our result. 
Result so far: 1468.0
Deduct 4424 from 4776 and we're left with 352.
Take the next digit (5) from the dividend and append it to 352, then repeat: 3525 / 553

Moving on to step 7:
3525 divided by 553 is 6 with a remainder of 207.
Write down 6 as next digit of the result. 
Result so far: 14686.0
If we take 3318 away from 3525, we end up with 207.
Grab the next digit (7) from the dividend, add it to 207, then carry on: 2077 / 553

Advancing to step 8:
553 can be fit into 2077 3 times, resulting in a remainder of 418.
The number 3 becomes the next digit in our result. 
Result so far: 146863.0
If we subtract 1659 from 2077, we get 418.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4180, and continue the process.

Moving on to step 9:
553 goes into 4180 7 times with a remainder of 309.
Put 7 as the next digit of the answer. 
Result so far: 146863.7
Deduct 3871 from 4180 and we're left with 309.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

On to step 10:
If we divide 3090 by 553, we get 5 and a remainder of 325.
Use 5 as the next digit of our solution. 
Result so far: 146863.75
The remainder is 325 after subtracting 2765 from 3090.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3250, and continue the process.

Moving on to step 11:
553 goes into 3250 5 times with a remainder of 485.
Record the quotient 5 as the next digit in the result. 
Result so far: 146863.755
Deduct 2765 from 3250 and we're left with 485.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4850, and continue the process.

Our division results in 146863.755 with a remaining 0.0485.