We look at the division of 303329 by 21 
We're looking to find how many times 21 goes into 303329.

Advancing to step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (0) from the dividend after 3, then repeat: 30 / 21

Let's proceed to step 2:
21 goes into 30 1 times with a remainder of 9.
Put 1 as the next digit of the answer. 
Result so far: 1.0
If we subtract 21 from 30, we get 9.
Append the next digit (3) from the dividend to 9 and continue with: 93 / 21

Let's proceed to step 3:
93 divided by 21 is 4 with a remainder of 9.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Subtract 84 from 93 to get 9.
Fetch the next digit (3) from the dividend, attach it to 9 and continue: 93 / 21

Advancing to step 4:
When dividing 93 by 21, we get 4 with a remainder of 9.
Use 4 as the next digit of our solution. 
Result so far: 144.0
The remainder is 9 after subtracting 84 from 93.
Fetch the next digit (2) from the dividend, attach it to 9 and continue: 92 / 21

Going ahead to step 5:
The number 21 fits into 92 4 times, leaving a remainder of 8.
Write down 4 as next digit of the result. 
Result so far: 1444.0
Deduct 84 from 92 and we're left with 8.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 21

Let's proceed to step 6:
If we divide 89 by 21, we get 4 and a remainder of 5.
Put 4 as the next digit of the answer. 
Result so far: 14444.0
Deduct 84 from 89 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Advancing to step 7:
When dividing 50 by 21, we get 2 with a remainder of 8.
Write down 2 as next digit of the result. 
Result so far: 14444.2
Subtract 42 from 50 to get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 8:
When dividing 80 by 21, we get 3 with a remainder of 17.
The number 3 becomes the next digit in our result. 
Result so far: 14444.23
Subtracting 63 from 80 leaves us with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

Moving on to step 9:
When dividing 170 by 21, we get 8 with a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 14444.238
If we subtract 168 from 170, we get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Going ahead to step 10:
When dividing 20 by 21, we get 0 with a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 14444.238
If we take 0 away from 20, we end up with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

On to step 11:
21 can be fit into 200 9 times, resulting in a remainder of 11.
The number 9 becomes the next digit in our result. 
Result so far: 14444.23809
Deduct 189 from 200 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Going ahead to step 12:
110 divided by 21 is 5 with a remainder of 5.
The number 5 becomes the next digit in our result. 
Result so far: 14444.238095
The remainder is 5 after subtracting 105 from 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 13:
21 goes into 50 2 times with a remainder of 8.
The next digit of our result is 2. 
Result so far: 14444.2380952
If we subtract 42 from 50, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 14:
80 divided by 21 is 3 with a remainder of 17.
The next digit of our result is 3. 
Result so far: 14444.23809523
Deduct 63 from 80 and we're left with 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

In conclusion, the division gives 14444.23809523 with a balance of 1.7e-08.