We divide 42521 by 99
We want to divide 42521 by 99.

Moving on to step 1:
When dividing 4 by 99, we get 0 with a remainder of 4.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 4 leaves us with 4.
Append the next digit (2) from the dividend to 4 and continue with: 42 / 99

Going ahead to step 2:
When dividing 42 by 99, we get 0 with a remainder of 42.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 42 and we're left with 42.
Fetch the next digit (5) from the dividend, attach it to 42 and continue: 425 / 99

On to step 3:
When dividing 425 by 99, we get 4 with a remainder of 29.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Deduct 396 from 425 and we're left with 29.
Include the next digit (2) from the dividend after 29, then repeat: 292 / 99

Going ahead to step 4:
99 goes into 292 2 times with a remainder of 94.
The number 2 becomes the next digit in our result. 
Result so far: 42.0
If we take 198 away from 292, we end up with 94.
Take the next digit (1) from the dividend and append it to 94, then repeat: 941 / 99

Step 5:
The number 99 fits into 941 9 times, leaving a remainder of 50.
The number 9 becomes the next digit in our result. 
Result so far: 429.0
If we take 891 away from 941, 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.

Advancing to step 6:
If we divide 500 by 99, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 429.5
The remainder is 5 after subtracting 495 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
If we divide 50 by 99, we get 0 and a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 429.5
Deduct 0 from 50 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:
If we divide 500 by 99, we get 5 and a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 429.505
The remainder is 5 after subtracting 495 from 500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 9:
99 goes into 50 0 times with a remainder of 50.
Record the quotient 0 as the next digit in the result. 
Result so far: 429.505
If we take 0 away from 50, 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.

On to step 10:
99 goes into 500 5 times with a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 429.50505
If we subtract 495 from 500, we get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 11:
99 can be fit into 50 0 times, resulting in a remainder of 50.
The next digit of our result is 0. 
Result so far: 429.50505
If we take 0 away from 50, 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.

Step 12:
99 can be fit into 500 5 times, resulting in a remainder of 5.
Put 5 as the next digit of the answer. 
Result so far: 429.5050505
Subtracting 495 from 500 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 13:
99 goes into 50 0 times with a remainder of 50.
Write down 0 as next digit of the result. 
Result so far: 429.5050505
If we take 0 away from 50, 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.

The final result is 429.5050505 with a remainder of 5e-08.