Let's divide 624288 by 21
We want to divide 624288 by 21.

Moving on to step 1:
21 goes into 6 0 times with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (2) from the dividend to 6 and continue with: 62 / 21

Let's proceed to step 2:
62 divided by 21 is 2 with a remainder of 20.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 42 from 62 and we're left with 20.
Fetch the next digit (4) from the dividend, attach it to 20 and continue: 204 / 21

Advancing to step 3:
When dividing 204 by 21, we get 9 with a remainder of 15.
Use 9 as the next digit of our solution. 
Result so far: 29.0
The remainder is 15 after subtracting 189 from 204.
Include the next digit (2) from the dividend after 15, then repeat: 152 / 21

Step 4:
21 can be fit into 152 7 times, resulting in a remainder of 5.
Write down 7 as next digit of the result. 
Result so far: 297.0
Subtract 147 from 152 to get 5.
Bring next digit (8) of the dividend behind the 5 and repeat the process: 58 / 21

Step 5:
The number 21 fits into 58 2 times, leaving a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 2972.0
If we take 42 away from 58, we end up with 16.
Fetch the next digit (8) from the dividend, attach it to 16 and continue: 168 / 21

Moving on to step 6:
21 goes into 168 8 times with a remainder of 0.
Put 8 as the next digit of the answer. 
Result so far: 29728.0
Subtract 168 from 168 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 7:
When dividing 0 by 21, we get 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 29728.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Advancing to step 8:
0 divided by 21 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 29728.0
Deduct 0 from 0 and we're left 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.

Our division results in 29728.0 with a remaining 0.0.