457636 divided by 21 
We want to divide 457636 by 21.

Step 1:
When dividing 4 by 21, we get 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 21

Step 2:
The number 21 fits into 45 2 times, leaving a remainder of 3.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Subtracting 42 from 45 leaves us with 3.
Take the next digit (7) from the dividend and append it to 3, then repeat: 37 / 21

Going ahead to step 3:
When dividing 37 by 21, we get 1 with a remainder of 16.
Write down 1 as next digit of the result. 
Result so far: 21.0
If we take 21 away from 37, we end up with 16.
Append the next digit (6) from the dividend to 16 and continue with: 166 / 21

Let's proceed to step 4:
If we divide 166 by 21, we get 7 and a remainder of 19.
Write down 7 as next digit of the result. 
Result so far: 217.0
The remainder is 19 after subtracting 147 from 166.
Append the next digit (3) from the dividend to 19 and continue with: 193 / 21

Step 5:
When dividing 193 by 21, we get 9 with a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 2179.0
Deduct 189 from 193 and we're left with 4.
Fetch the next digit (6) from the dividend, attach it to 4 and continue: 46 / 21

Step 6:
21 can be fit into 46 2 times, resulting in a remainder of 4.
Write down 2 as next digit of the result. 
Result so far: 21792.0
If we take 42 away from 46, we end up with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 7:
If we divide 40 by 21, we get 1 and a remainder of 19.
The next digit of our result is 1. 
Result so far: 21792.1
Deduct 21 from 40 and we're left with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

On to step 8:
If we divide 190 by 21, we get 9 and a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 21792.19
Deduct 189 from 190 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Step 9:
When dividing 10 by 21, we get 0 with a remainder of 10.
Record the quotient 0 as the next digit in the result. 
Result so far: 21792.19
Subtract 0 from 10 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.

Step 10:
21 can be fit into 100 4 times, resulting in a remainder of 16.
Record the quotient 4 as the next digit in the result. 
Result so far: 21792.1904
Subtracting 84 from 100 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 11:
When dividing 160 by 21, we get 7 with a remainder of 13.
Record the quotient 7 as the next digit in the result. 
Result so far: 21792.19047
Subtract 147 from 160 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Step 12:
If we divide 130 by 21, we get 6 and a remainder of 4.
Put 6 as the next digit of the answer. 
Result so far: 21792.190476
Subtract 126 from 130 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 13:
40 divided by 21 is 1 with a remainder of 19.
Write down 1 as next digit of the result. 
Result so far: 21792.1904761
The remainder is 19 after subtracting 21 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Going ahead to step 14:
190 divided by 21 is 9 with a remainder of 1.
Put 9 as the next digit of the answer. 
Result so far: 21792.19047619
If we subtract 189 from 190, 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.

The quotient of the division is 21792.19047619, and the remainder is 1e-09.