We divide 20588421 by 90
Our goal is to divide 20588421 by 90.

Moving on to step 1:
90 goes into 2 0 times with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 90

Going ahead to step 2:
The number 90 fits into 20 0 times, leaving a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 20, we get 20.
Fetch the next digit (5) from the dividend, attach it to 20 and continue: 205 / 90

Advancing to step 3:
90 can be fit into 205 2 times, resulting in a remainder of 25.
Put 2 as the next digit of the answer. 
Result so far: 2.0
If we take 180 away from 205, we end up with 25.
Grab the next digit (8) from the dividend, add it to 25, then carry on: 258 / 90

Step 4:
The number 90 fits into 258 2 times, leaving a remainder of 78.
The next digit of our result is 2. 
Result so far: 22.0
If we take 180 away from 258, we end up with 78.
Grab the next digit (8) from the dividend, add it to 78, then carry on: 788 / 90

On to step 5:
If we divide 788 by 90, we get 8 and a remainder of 68.
The next digit of our result is 8. 
Result so far: 228.0
If we subtract 720 from 788, we get 68.
Include the next digit (4) from the dividend after 68, then repeat: 684 / 90

On to step 6:
90 can be fit into 684 7 times, resulting in a remainder of 54.
Use 7 as the next digit of our solution. 
Result so far: 2287.0
Subtract 630 from 684 to get 54.
Append the next digit (2) from the dividend to 54 and continue with: 542 / 90

On to step 7:
542 divided by 90 is 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 22876.0
If we subtract 540 from 542, we get 2.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 90

Let's proceed to step 8:
21 divided by 90 is 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 228760.0
Subtract 0 from 21 to get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Step 9:
210 divided by 90 is 2 with a remainder of 30.
Record the quotient 2 as the next digit in the result. 
Result so far: 228760.2
Subtract 180 from 210 to get 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

On to step 10:
The number 90 fits into 300 3 times, leaving a remainder of 30.
Put 3 as the next digit of the answer. 
Result so far: 228760.23
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

Let's proceed to step 11:
300 divided by 90 is 3 with a remainder of 30.
Write down 3 as next digit of the result. 
Result so far: 228760.233
Subtracting 270 from 300 leaves us with 30.
Since there are no more digits in the dividend, we add a zero to the remainder making it 300, and continue the process.

The quotient of the division is 228760.233, and the remainder is 0.003.