273560 ÷ 21 
We want to figure out the number of times 273560 can be divided by 21.

Step 1:
When dividing 2 by 21, we get 0 with a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Include the next digit (7) from the dividend after 2, then repeat: 27 / 21

Step 2:
21 goes into 27 1 times with a remainder of 6.
The next digit of our result is 1. 
Result so far: 1.0
Subtract 21 from 27 to get 6.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 21

Going ahead to step 3:
When dividing 63 by 21, we get 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we subtract 63 from 63, we get 0.
Grab the next digit (5) from the dividend, add it to 0, then carry on: 5 / 21

Step 4:
The number 21 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 130.0
The remainder is 5 after subtracting 0 from 5.
Fetch the next digit (6) from the dividend, attach it to 5 and continue: 56 / 21

Advancing to step 5:
21 can be fit into 56 2 times, resulting in a remainder of 14.
The next digit of our result is 2. 
Result so far: 1302.0
The remainder is 14 after subtracting 42 from 56.
Append the next digit (0) from the dividend to 14 and continue with: 140 / 21

Moving on to step 6:
21 goes into 140 6 times with a remainder of 14.
The next digit of our result is 6. 
Result so far: 13026.0
Subtracting 126 from 140 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.

Advancing to step 7:
If we divide 140 by 21, we get 6 and a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 13026.6
If we subtract 126 from 140, we get 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 8:
21 can be fit into 140 6 times, resulting in a remainder of 14.
The next digit of our result is 6. 
Result so far: 13026.66
Subtracting 126 from 140 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.

The final result is 13026.66 with a remainder of 0.014.