We divide 21542 by 10
We're looking to find how many times 10 goes into 21542.

On to step 1:
The number 10 fits into 2 0 times, leaving a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Include the next digit (1) from the dividend after 2, then repeat: 21 / 10

Step 2:
If we divide 21 by 10, we get 2 and a remainder of 1.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtracting 20 from 21 leaves us with 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 10

Moving on to step 3:
15 divided by 10 is 1 with a remainder of 5.
The next digit of our result is 1. 
Result so far: 21.0
Deduct 10 from 15 and we're left with 5.
Fetch the next digit (4) from the dividend, attach it to 5 and continue: 54 / 10

Advancing to step 4:
10 can be fit into 54 5 times, resulting in a remainder of 4.
The number 5 becomes the next digit in our result. 
Result so far: 215.0
Subtract 50 from 54 to get 4.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 10

Going ahead to step 5:
The number 10 fits into 42 4 times, leaving a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 2154.0
If we subtract 40 from 42, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Step 6:
When dividing 20 by 10, we get 2 with a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2154.2
If we subtract 20 from 20, we 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.

Going ahead to step 7:
10 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 2154.2
The remainder is 0 after subtracting 0 from 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 10 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 2154.2
If we subtract 0 from 0, we 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.

The quotient of the division is 2154.2, and the remainder is 0.0.