51898 ÷ 90 
Our goal is to divide 51898 by 90.

On to step 1:
90 goes into 5 0 times with a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Bring next digit (1) of the dividend behind the 5 and repeat the process: 51 / 90

Going ahead to step 2:
If we divide 51 by 90, we get 0 and a remainder of 51.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 51 and we're left with 51.
Fetch the next digit (8) from the dividend, attach it to 51 and continue: 518 / 90

Going ahead to step 3:
The number 90 fits into 518 5 times, leaving a remainder of 68.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
If we take 450 away from 518, we end up with 68.
Append the next digit (9) from the dividend to 68 and continue with: 689 / 90

Advancing to step 4:
When dividing 689 by 90, we get 7 with a remainder of 59.
Use 7 as the next digit of our solution. 
Result so far: 57.0
Subtracting 630 from 689 leaves us with 59.
Include the next digit (8) from the dividend after 59, then repeat: 598 / 90

Advancing to step 5:
The number 90 fits into 598 6 times, leaving a remainder of 58.
Use 6 as the next digit of our solution. 
Result so far: 576.0
Subtracting 540 from 598 leaves us with 58.
Since there are no more digits in the dividend, we add a zero to the remainder making it 580, and continue the process.

On to step 6:
580 divided by 90 is 6 with a remainder of 40.
The next digit of our result is 6. 
Result so far: 576.6
If we take 540 away from 580, we end up with 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Going ahead to step 7:
400 divided by 90 is 4 with a remainder of 40.
The next digit of our result is 4. 
Result so far: 576.64
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

Advancing to step 8:
The number 90 fits into 400 4 times, leaving a remainder of 40.
Write down 4 as next digit of the result. 
Result so far: 576.644
The remainder is 40 after subtracting 360 from 400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 400, and continue the process.

After the division, we end up with 576.644 and a remainder of 0.004.