Let's divide 21036990 by 456
Our goal is to divide 21036990 by 456.

Let's proceed to step 1:
456 goes into 2 0 times with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 456

Advancing to step 2:
21 divided by 456 is 0 with a remainder of 21.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Fetch the next digit (0) from the dividend, attach it to 21 and continue: 210 / 456

Step 3:
210 divided by 456 is 0 with a remainder of 210.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 210, we end up with 210.
Include the next digit (3) from the dividend after 210, then repeat: 2103 / 456

On to step 4:
If we divide 2103 by 456, we get 4 and a remainder of 279.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
The remainder is 279 after subtracting 1824 from 2103.
Fetch the next digit (6) from the dividend, attach it to 279 and continue: 2796 / 456

Let's proceed to step 5:
The number 456 fits into 2796 6 times, leaving a remainder of 60.
Record the quotient 6 as the next digit in the result. 
Result so far: 46.0
If we subtract 2736 from 2796, we get 60.
Fetch the next digit (9) from the dividend, attach it to 60 and continue: 609 / 456

Advancing to step 6:
609 divided by 456 is 1 with a remainder of 153.
The number 1 becomes the next digit in our result. 
Result so far: 461.0
Subtracting 456 from 609 leaves us with 153.
Fetch the next digit (9) from the dividend, attach it to 153 and continue: 1539 / 456

On to step 7:
456 goes into 1539 3 times with a remainder of 171.
Record the quotient 3 as the next digit in the result. 
Result so far: 4613.0
Subtracting 1368 from 1539 leaves us with 171.
Fetch the next digit (0) from the dividend, attach it to 171 and continue: 1710 / 456

Moving on to step 8:
456 goes into 1710 3 times with a remainder of 342.
Write down 3 as next digit of the result. 
Result so far: 46133.0
If we take 1368 away from 1710, we end up with 342.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3420, and continue the process.

Step 9:
The number 456 fits into 3420 7 times, leaving a remainder of 228.
The number 7 becomes the next digit in our result. 
Result so far: 46133.7
Subtracting 3192 from 3420 leaves us with 228.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2280, and continue the process.

Going ahead to step 10:
The number 456 fits into 2280 5 times, leaving a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 46133.75
The remainder is 0 after subtracting 2280 from 2280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 11:
The number 456 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 46133.75
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 12:
When dividing 0 by 456, we get 0 with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 46133.75
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 46133.75 and a remainder of 0.0.