We look at the division of 330935 by 21 
We want to figure out the number of times 330935 can be divided by 21.

Going ahead to step 1:
21 can be fit into 3 0 times, resulting in a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Bring next digit (3) of the dividend behind the 3 and repeat the process: 33 / 21

Going ahead to step 2:
If we divide 33 by 21, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
The remainder is 12 after subtracting 21 from 33.
Fetch the next digit (0) from the dividend, attach it to 12 and continue: 120 / 21

Going ahead to step 3:
120 divided by 21 is 5 with a remainder of 15.
Put 5 as the next digit of the answer. 
Result so far: 15.0
Deduct 105 from 120 and we're left with 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 21

Moving on to step 4:
The number 21 fits into 159 7 times, leaving a remainder of 12.
The number 7 becomes the next digit in our result. 
Result so far: 157.0
If we take 147 away from 159, we end up with 12.
Take the next digit (3) from the dividend and append it to 12, then repeat: 123 / 21

Step 5:
When dividing 123 by 21, we get 5 with a remainder of 18.
Put 5 as the next digit of the answer. 
Result so far: 1575.0
Subtracting 105 from 123 leaves us with 18.
Grab the next digit (5) from the dividend, add it to 18, then carry on: 185 / 21

Let's proceed to step 6:
The number 21 fits into 185 8 times, leaving a remainder of 17.
Use 8 as the next digit of our solution. 
Result so far: 15758.0
Subtracting 168 from 185 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.

Advancing to step 7:
21 can be fit into 170 8 times, resulting in a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 15758.8
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 8:
If we divide 20 by 21, we get 0 and a remainder of 20.
Use 0 as the next digit of our solution. 
Result so far: 15758.8
Subtract 0 from 20 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Going ahead to step 9:
If we divide 200 by 21, we get 9 and a remainder of 11.
Put 9 as the next digit of the answer. 
Result so far: 15758.809
If we take 189 away from 200, we end up 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 10:
21 can be fit into 110 5 times, resulting in a remainder of 5.
Write down 5 as next digit of the result. 
Result so far: 15758.8095
Subtracting 105 from 110 leaves us 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.

Step 11:
50 divided by 21 is 2 with a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 15758.80952
Deduct 42 from 50 and we're left with 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 12:
21 goes into 80 3 times with a remainder of 17.
Write down 3 as next digit of the result. 
Result so far: 15758.809523
If we subtract 63 from 80, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

On to step 13:
170 divided by 21 is 8 with a remainder of 2.
Put 8 as the next digit of the answer. 
Result so far: 15758.8095238
Deduct 168 from 170 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 14:
20 divided by 21 is 0 with a remainder of 20.
The next digit of our result is 0. 
Result so far: 15758.8095238
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

The final outcome is 15758.8095238, with a leftover of 2e-08.