We divide 303279 by 21
We're looking to find how many times 21 goes into 303279.

Let's proceed to step 1:
If we divide 3 by 21, we get 0 and a remainder of 3.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 3 leaves us with 3.
Take the next digit (0) from the dividend and append it to 3, then repeat: 30 / 21

On to step 2:
21 goes into 30 1 times with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 21 from 30 and we're left with 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 21

Let's proceed to step 3:
The number 21 fits into 93 4 times, leaving a remainder of 9.
Record the quotient 4 as the next digit in the result. 
Result so far: 14.0
If we subtract 84 from 93, we get 9.
Take the next digit (2) from the dividend and append it to 9, then repeat: 92 / 21

Moving on to step 4:
21 goes into 92 4 times with a remainder of 8.
The next digit of our result is 4. 
Result so far: 144.0
The remainder is 8 after subtracting 84 from 92.
Include the next digit (7) from the dividend after 8, then repeat: 87 / 21

Let's proceed to step 5:
If we divide 87 by 21, we get 4 and a remainder of 3.
The next digit of our result is 4. 
Result so far: 1444.0
Deduct 84 from 87 and we're left with 3.
Take the next digit (9) from the dividend and append it to 3, then repeat: 39 / 21

On to step 6:
21 goes into 39 1 times with a remainder of 18.
The next digit of our result is 1. 
Result so far: 14441.0
If we take 21 away from 39, we end up with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 7:
180 divided by 21 is 8 with a remainder of 12.
Write down 8 as next digit of the result. 
Result so far: 14441.8
If we subtract 168 from 180, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Let's proceed to step 8:
21 can be fit into 120 5 times, resulting in a remainder of 15.
Record the quotient 5 as the next digit in the result. 
Result so far: 14441.85
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

On to step 9:
21 goes into 150 7 times with a remainder of 3.
The next digit of our result is 7. 
Result so far: 14441.857
If we subtract 147 from 150, we get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Advancing to step 10:
When dividing 30 by 21, we get 1 with a remainder of 9.
Use 1 as the next digit of our solution. 
Result so far: 14441.8571
Subtract 21 from 30 to get 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Let's proceed to step 11:
21 can be fit into 90 4 times, resulting in a remainder of 6.
The next digit of our result is 4. 
Result so far: 14441.85714
Deduct 84 from 90 and we're left with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 12:
21 can be fit into 60 2 times, resulting in a remainder of 18.
The next digit of our result is 2. 
Result so far: 14441.857142
Subtract 42 from 60 to get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 13:
The number 21 fits into 180 8 times, leaving a remainder of 12.
Record the quotient 8 as the next digit in the result. 
Result so far: 14441.8571428
Subtracting 168 from 180 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 14:
21 goes into 120 5 times with a remainder of 15.
Write down 5 as next digit of the result. 
Result so far: 14441.85714285
Subtract 105 from 120 to get 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

The final result is 14441.85714285 with a remainder of 1.5e-08.