We divide 533664 by 21
Let's see how many times 21 fits into 533664.

Let's proceed to step 1:
The number 21 fits into 5 0 times, leaving a remainder of 5.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Take the next digit (3) from the dividend and append it to 5, then repeat: 53 / 21

Advancing to step 2:
If we divide 53 by 21, we get 2 and a remainder of 11.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
Subtracting 42 from 53 leaves us with 11.
Bring next digit (3) of the dividend behind the 11 and repeat the process: 113 / 21

On to step 3:
21 can be fit into 113 5 times, resulting in a remainder of 8.
The number 5 becomes the next digit in our result. 
Result so far: 25.0
Deduct 105 from 113 and we're left with 8.
Grab the next digit (6) from the dividend, add it to 8, then carry on: 86 / 21

Going ahead to step 4:
When dividing 86 by 21, we get 4 with a remainder of 2.
The next digit of our result is 4. 
Result so far: 254.0
If we take 84 away from 86, we end up with 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 21

Advancing to step 5:
If we divide 26 by 21, we get 1 and a remainder of 5.
The next digit of our result is 1. 
Result so far: 2541.0
Deduct 21 from 26 and we're left with 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 21

Step 6:
If we divide 54 by 21, we get 2 and a remainder of 12.
Write down 2 as next digit of the result. 
Result so far: 25412.0
If we take 42 away from 54, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
120 divided by 21 is 5 with a remainder of 15.
Use 5 as the next digit of our solution. 
Result so far: 25412.5
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 8:
When dividing 150 by 21, we get 7 with a remainder of 3.
Record the quotient 7 as the next digit in the result. 
Result so far: 25412.57
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

On to step 9:
21 can be fit into 30 1 times, resulting in a remainder of 9.
Write down 1 as next digit of the result. 
Result so far: 25412.571
If we take 21 away from 30, we end up with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Advancing to step 10:
The number 21 fits into 90 4 times, leaving a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 25412.5714
Subtracting 84 from 90 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

Advancing to step 11:
21 goes into 60 2 times with a remainder of 18.
Write down 2 as next digit of the result. 
Result so far: 25412.57142
Subtracting 42 from 60 leaves us with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 12:
When dividing 180 by 21, we get 8 with a remainder of 12.
The number 8 becomes the next digit in our result. 
Result so far: 25412.571428
If we take 168 away from 180, we end up with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 13:
120 divided by 21 is 5 with a remainder of 15.
The next digit of our result is 5. 
Result so far: 25412.5714285
The remainder is 15 after subtracting 105 from 120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 14:
21 can be fit into 150 7 times, resulting in a remainder of 3.
Put 7 as the next digit of the answer. 
Result so far: 25412.57142857
The remainder is 3 after subtracting 147 from 150.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

The final result is 25412.57142857 with a remainder of 3e-09.