Let's divide 72156021 by 63
Our goal is to divide 72156021 by 63.

Moving on to step 1:
63 can be fit into 7 0 times, resulting in a remainder of 7.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 63

On to step 2:
72 divided by 63 is 1 with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Deduct 63 from 72 and we're left with 9.
Take the next digit (1) from the dividend and append it to 9, then repeat: 91 / 63

On to step 3:
If we divide 91 by 63, we get 1 and a remainder of 28.
The number 1 becomes the next digit in our result. 
Result so far: 11.0
Subtracting 63 from 91 leaves us with 28.
Include the next digit (5) from the dividend after 28, then repeat: 285 / 63

Step 4:
63 goes into 285 4 times with a remainder of 33.
Write down 4 as next digit of the result. 
Result so far: 114.0
If we subtract 252 from 285, we get 33.
Include the next digit (6) from the dividend after 33, then repeat: 336 / 63

On to step 5:
The number 63 fits into 336 5 times, leaving a remainder of 21.
Write down 5 as next digit of the result. 
Result so far: 1145.0
If we take 315 away from 336, we end up with 21.
Include the next digit (0) from the dividend after 21, then repeat: 210 / 63

Step 6:
When dividing 210 by 63, we get 3 with a remainder of 21.
The next digit of our result is 3. 
Result so far: 11453.0
Subtracting 189 from 210 leaves us with 21.
Bring next digit (2) of the dividend behind the 21 and repeat the process: 212 / 63

On to step 7:
63 can be fit into 212 3 times, resulting in a remainder of 23.
The next digit of our result is 3. 
Result so far: 114533.0
If we subtract 189 from 212, we get 23.
Include the next digit (1) from the dividend after 23, then repeat: 231 / 63

Going ahead to step 8:
63 can be fit into 231 3 times, resulting in a remainder of 42.
The number 3 becomes the next digit in our result. 
Result so far: 1145333.0
Subtracting 189 from 231 leaves us with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Going ahead to step 9:
If we divide 420 by 63, we get 6 and a remainder of 42.
The number 6 becomes the next digit in our result. 
Result so far: 1145333.6
Deduct 378 from 420 and we're left with 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

Step 10:
63 goes into 420 6 times with a remainder of 42.
Put 6 as the next digit of the answer. 
Result so far: 1145333.66
Subtract 378 from 420 to get 42.
Since there are no more digits in the dividend, we add a zero to the remainder making it 420, and continue the process.

In conclusion, the division gives 1145333.66 with a balance of 0.042.