We're dividing 21100 by 79 
We want to figure out the number of times 21100 can be divided by 79.

Step 1:
When dividing 2 by 79, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Fetch the next digit (1) from the dividend, attach it to 2 and continue: 21 / 79

Let's proceed to step 2:
21 divided by 79 is 0 with a remainder of 21.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 21 after subtracting 0 from 21.
Include the next digit (1) from the dividend after 21, then repeat: 211 / 79

Step 3:
The number 79 fits into 211 2 times, leaving a remainder of 53.
The next digit of our result is 2. 
Result so far: 2.0
Subtracting 158 from 211 leaves us with 53.
Include the next digit (0) from the dividend after 53, then repeat: 530 / 79

On to step 4:
The number 79 fits into 530 6 times, leaving a remainder of 56.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
If we subtract 474 from 530, we get 56.
Include the next digit (0) from the dividend after 56, then repeat: 560 / 79

Going ahead to step 5:
When dividing 560 by 79, we get 7 with a remainder of 7.
The number 7 becomes the next digit in our result. 
Result so far: 267.0
If we subtract 553 from 560, we get 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

On to step 6:
The number 79 fits into 70 0 times, leaving a remainder of 70.
The number 0 becomes the next digit in our result. 
Result so far: 267.0
If we take 0 away from 70, we end up with 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Moving on to step 7:
The number 79 fits into 700 8 times, leaving a remainder of 68.
Write down 8 as next digit of the result. 
Result so far: 267.08
If we subtract 632 from 700, we get 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Advancing to step 8:
The number 79 fits into 680 8 times, leaving a remainder of 48.
Put 8 as the next digit of the answer. 
Result so far: 267.088
If we take 632 away from 680, we end up with 48.
Since there are no more digits in the dividend, we add a zero to the remainder making it 480, and continue the process.

The final outcome is 267.088, with a leftover of 0.0048.