Let's divide 1211 by 21
Let's see how many times 21 fits into 1211.

Let's proceed to step 1:
1 divided by 21 is 0 with a remainder of 1.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Take the next digit (2) from the dividend and append it to 1, then repeat: 12 / 21

Advancing to step 2:
21 can be fit into 12 0 times, resulting in a remainder of 12.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 12, we get 12.
Fetch the next digit (1) from the dividend, attach it to 12 and continue: 121 / 21

Advancing to step 3:
21 goes into 121 5 times with a remainder of 16.
The number 5 becomes the next digit in our result. 
Result so far: 5.0
Subtracting 105 from 121 leaves us with 16.
Fetch the next digit (1) from the dividend, attach it to 16 and continue: 161 / 21

Let's proceed to step 4:
161 divided by 21 is 7 with a remainder of 14.
Put 7 as the next digit of the answer. 
Result so far: 57.0
Subtracting 147 from 161 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Going ahead to step 5:
21 can be fit into 140 6 times, resulting in a remainder of 14.
The number 6 becomes the next digit in our result. 
Result so far: 57.6
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

On to step 6:
The number 21 fits into 140 6 times, leaving a remainder of 14.
Write down 6 as next digit of the result. 
Result so far: 57.66
Deduct 126 from 140 and we're left with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

After the division, we end up with 57.66 and a remainder of 0.014.