We're dividing 300272 by 21 
We want to divide 300272 by 21.

Going ahead to step 1:
If we divide 3 by 21, we get 0 and a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 21

Advancing to step 2:
If we divide 30 by 21, we get 1 and a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we take 21 away from 30, we end up with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 21

Advancing to step 3:
90 divided by 21 is 4 with a remainder of 6.
The next digit of our result is 4. 
Result so far: 14.0
The remainder is 6 after subtracting 84 from 90.
Include the next digit (2) from the dividend after 6, then repeat: 62 / 21

Let's proceed to step 4:
The number 21 fits into 62 2 times, leaving a remainder of 20.
Use 2 as the next digit of our solution. 
Result so far: 142.0
If we subtract 42 from 62, we get 20.
Fetch the next digit (7) from the dividend, attach it to 20 and continue: 207 / 21

Let's proceed to step 5:
207 divided by 21 is 9 with a remainder of 18.
Put 9 as the next digit of the answer. 
Result so far: 1429.0
If we subtract 189 from 207, we get 18.
Bring next digit (2) of the dividend behind the 18 and repeat the process: 182 / 21

Step 6:
If we divide 182 by 21, we get 8 and a remainder of 14.
The next digit of our result is 8. 
Result so far: 14298.0
Subtracting 168 from 182 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:
When dividing 140 by 21, we get 6 with a remainder of 14.
The next digit of our result is 6. 
Result so far: 14298.6
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.

Moving on to step 8:
21 goes into 140 6 times with a remainder of 14.
Put 6 as the next digit of the answer. 
Result so far: 14298.66
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.

The quotient of the division is 14298.66, and the remainder is 0.014.