Let's divide 21561360 by 888
We want to figure out the number of times 21561360 can be divided by 888.

Advancing to step 1:
2 divided by 888 is 0 with a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 888

Going ahead to step 2:
888 can be fit into 21 0 times, resulting in a remainder of 21.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 21 and we're left with 21.
Append the next digit (5) from the dividend to 21 and continue with: 215 / 888

On to step 3:
When dividing 215 by 888, we get 0 with a remainder of 215.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 215, we end up with 215.
Fetch the next digit (6) from the dividend, attach it to 215 and continue: 2156 / 888

Let's proceed to step 4:
888 goes into 2156 2 times with a remainder of 380.
Write down 2 as next digit of the result. 
Result so far: 2.0
If we take 1776 away from 2156, we end up with 380.
Take the next digit (1) from the dividend and append it to 380, then repeat: 3801 / 888

Moving on to step 5:
3801 divided by 888 is 4 with a remainder of 249.
The number 4 becomes the next digit in our result. 
Result so far: 24.0
If we subtract 3552 from 3801, we get 249.
Include the next digit (3) from the dividend after 249, then repeat: 2493 / 888

Going ahead to step 6:
888 goes into 2493 2 times with a remainder of 717.
The number 2 becomes the next digit in our result. 
Result so far: 242.0
Subtracting 1776 from 2493 leaves us with 717.
Fetch the next digit (6) from the dividend, attach it to 717 and continue: 7176 / 888

On to step 7:
If we divide 7176 by 888, we get 8 and a remainder of 72.
Write down 8 as next digit of the result. 
Result so far: 2428.0
Subtracting 7104 from 7176 leaves us with 72.
Include the next digit (0) from the dividend after 72, then repeat: 720 / 888

Step 8:
888 goes into 720 0 times with a remainder of 720.
Write down 0 as next digit of the result. 
Result so far: 24280.0
Deduct 0 from 720 and we're left with 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

On to step 9:
When dividing 7200 by 888, we get 8 with a remainder of 96.
The number 8 becomes the next digit in our result. 
Result so far: 24280.8
If we subtract 7104 from 7200, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Advancing to step 10:
If we divide 960 by 888, we get 1 and a remainder of 72.
Write down 1 as next digit of the result. 
Result so far: 24280.81
If we take 888 away from 960, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Step 11:
If we divide 720 by 888, we get 0 and a remainder of 720.
The number 0 becomes the next digit in our result. 
Result so far: 24280.81
The remainder is 720 after subtracting 0 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

Moving on to step 12:
The number 888 fits into 7200 8 times, leaving a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 24280.8108
Subtracting 7104 from 7200 leaves us with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Step 13:
When dividing 960 by 888, we get 1 with a remainder of 72.
Put 1 as the next digit of the answer. 
Result so far: 24280.81081
The remainder is 72 after subtracting 888 from 960.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 14:
720 divided by 888 is 0 with a remainder of 720.
Write down 0 as next digit of the result. 
Result so far: 24280.81081
Subtract 0 from 720 to get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

On to step 15:
888 goes into 7200 8 times with a remainder of 96.
Put 8 as the next digit of the answer. 
Result so far: 24280.8108108
Deduct 7104 from 7200 and we're left with 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

On to step 16:
When dividing 960 by 888, we get 1 with a remainder of 72.
Write down 1 as next digit of the result. 
Result so far: 24280.81081081
If we take 888 away from 960, we end up with 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

The final outcome is 24280.81081081, with a leftover of 7.2e-08.