We divide 21158753 by 90
We want to divide 21158753 by 90.

Advancing to step 1:
90 goes into 2 0 times with a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 90

Let's proceed to step 2:
When dividing 21 by 90, we get 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 21 to get 21.
Take the next digit (1) from the dividend and append it to 21, then repeat: 211 / 90

Let's proceed to step 3:
211 divided by 90 is 2 with a remainder of 31.
Use 2 as the next digit of our solution. 
Result so far: 2.0
If we take 180 away from 211, we end up with 31.
Include the next digit (5) from the dividend after 31, then repeat: 315 / 90

Let's proceed to step 4:
When dividing 315 by 90, we get 3 with a remainder of 45.
The next digit of our result is 3. 
Result so far: 23.0
Subtract 270 from 315 to get 45.
Append the next digit (8) from the dividend to 45 and continue with: 458 / 90

Step 5:
If we divide 458 by 90, we get 5 and a remainder of 8.
Write down 5 as next digit of the result. 
Result so far: 235.0
If we take 450 away from 458, we end up with 8.
Take the next digit (7) from the dividend and append it to 8, then repeat: 87 / 90

Going ahead to step 6:
90 can be fit into 87 0 times, resulting in a remainder of 87.
Use 0 as the next digit of our solution. 
Result so far: 2350.0
The remainder is 87 after subtracting 0 from 87.
Append the next digit (5) from the dividend to 87 and continue with: 875 / 90

Going ahead to step 7:
875 divided by 90 is 9 with a remainder of 65.
Record the quotient 9 as the next digit in the result. 
Result so far: 23509.0
Subtract 810 from 875 to get 65.
Include the next digit (3) from the dividend after 65, then repeat: 653 / 90

Going ahead to step 8:
90 can be fit into 653 7 times, resulting in a remainder of 23.
Use 7 as the next digit of our solution. 
Result so far: 235097.0
If we take 630 away from 653, we end up with 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Advancing to step 9:
When dividing 230 by 90, we get 2 with a remainder of 50.
Record the quotient 2 as the next digit in the result. 
Result so far: 235097.2
Deduct 180 from 230 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.

Going ahead to step 10:
The number 90 fits into 500 5 times, leaving a remainder of 50.
Use 5 as the next digit of our solution. 
Result so far: 235097.25
If we take 450 away from 500, 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.

Moving on to step 11:
If we divide 500 by 90, we get 5 and a remainder of 50.
The number 5 becomes the next digit in our result. 
Result so far: 235097.255
Subtract 450 from 500 to get 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 quotient of the division is 235097.255, and the remainder is 0.005.