236521 ÷ 90 
We want to divide 236521 by 90.

Moving on to step 1:
90 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (3) of the dividend behind the 2 and repeat the process: 23 / 90

On to step 2:
If we divide 23 by 90, we get 0 and a remainder of 23.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 23, we get 23.
Take the next digit (6) from the dividend and append it to 23, then repeat: 236 / 90

Moving on to step 3:
90 goes into 236 2 times with a remainder of 56.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Deduct 180 from 236 and we're left with 56.
Fetch the next digit (5) from the dividend, attach it to 56 and continue: 565 / 90

Let's proceed to step 4:
When dividing 565 by 90, we get 6 with a remainder of 25.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Deduct 540 from 565 and we're left with 25.
Include the next digit (2) from the dividend after 25, then repeat: 252 / 90

Moving on to step 5:
90 can be fit into 252 2 times, resulting in a remainder of 72.
Record the quotient 2 as the next digit in the result. 
Result so far: 262.0
If we take 180 away from 252, we end up with 72.
Take the next digit (1) from the dividend and append it to 72, then repeat: 721 / 90

Going ahead to step 6:
90 can be fit into 721 8 times, resulting in a remainder of 1.
Record the quotient 8 as the next digit in the result. 
Result so far: 2628.0
If we subtract 720 from 721, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 7:
The number 90 fits into 10 0 times, leaving a remainder of 10.
The next digit of our result is 0. 
Result so far: 2628.0
Deduct 0 from 10 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 8:
90 goes into 100 1 times with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 2628.01
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
If we divide 100 by 90, we get 1 and a remainder of 10.
Record the quotient 1 as the next digit in the result. 
Result so far: 2628.011
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

After the division, we end up with 2628.011 and a remainder of 0.001.