We look at the division of 51557 by 90 
We want to figure out the number of times 51557 can be divided by 90.

Moving on to step 1:
90 can be fit into 5 0 times, resulting in a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 90

Going ahead to step 2:
When dividing 51 by 90, we get 0 with a remainder of 51.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 51 after subtracting 0 from 51.
Bring next digit (5) of the dividend behind the 51 and repeat the process: 515 / 90

On to step 3:
90 can be fit into 515 5 times, resulting in a remainder of 65.
Record the quotient 5 as the next digit in the result. 
Result so far: 5.0
If we take 450 away from 515, we end up with 65.
Include the next digit (5) from the dividend after 65, then repeat: 655 / 90

On to step 4:
If we divide 655 by 90, we get 7 and a remainder of 25.
The next digit of our result is 7. 
Result so far: 57.0
If we take 630 away from 655, we end up with 25.
Grab the next digit (7) from the dividend, add it to 25, then carry on: 257 / 90

Moving on to step 5:
When dividing 257 by 90, we get 2 with a remainder of 77.
The next digit of our result is 2. 
Result so far: 572.0
If we subtract 180 from 257, we get 77.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Moving on to step 6:
The number 90 fits into 770 8 times, leaving a remainder of 50.
Use 8 as the next digit of our solution. 
Result so far: 572.8
If we take 720 away from 770, we end up with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Going ahead to step 7:
The number 90 fits into 500 5 times, leaving a remainder of 50.
Put 5 as the next digit of the answer. 
Result so far: 572.85
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

On to step 8:
The number 90 fits into 500 5 times, leaving a remainder of 50.
Record the quotient 5 as the next digit in the result. 
Result so far: 572.855
Deduct 450 from 500 and we're left with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Our division results in 572.855 with a remaining 0.005.