We look at the division of 133313 by 21 
We're looking to find how many times 21 goes into 133313.

On to step 1:
The number 21 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 1 to get 1.
Bring next digit (3) of the dividend behind the 1 and repeat the process: 13 / 21

Going ahead to step 2:
If we divide 13 by 21, we get 0 and a remainder of 13.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Deduct 0 from 13 and we're left with 13.
Fetch the next digit (3) from the dividend, attach it to 13 and continue: 133 / 21

On to step 3:
The number 21 fits into 133 6 times, leaving a remainder of 7.
The number 6 becomes the next digit in our result. 
Result so far: 6.0
If we subtract 126 from 133, we get 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 21

Advancing to step 4:
73 divided by 21 is 3 with a remainder of 10.
Record the quotient 3 as the next digit in the result. 
Result so far: 63.0
If we subtract 63 from 73, we get 10.
Bring next digit (1) of the dividend behind the 10 and repeat the process: 101 / 21

Moving on to step 5:
The number 21 fits into 101 4 times, leaving a remainder of 17.
Write down 4 as next digit of the result. 
Result so far: 634.0
The remainder is 17 after subtracting 84 from 101.
Fetch the next digit (3) from the dividend, attach it to 17 and continue: 173 / 21

Step 6:
The number 21 fits into 173 8 times, leaving a remainder of 5.
The number 8 becomes the next digit in our result. 
Result so far: 6348.0
Subtracting 168 from 173 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 7:
When dividing 50 by 21, we get 2 with a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 6348.2
The remainder is 8 after subtracting 42 from 50.
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 8:
21 goes into 80 3 times with a remainder of 17.
Use 3 as the next digit of our solution. 
Result so far: 6348.23
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.

Moving on to step 9:
21 goes into 170 8 times with a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 6348.238
If we take 168 away from 170, we end up 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.

Step 10:
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: 6348.238
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.

On to step 11:
21 can be fit into 200 9 times, resulting in a remainder of 11.
Write down 9 as next digit of the result. 
Result so far: 6348.23809
Subtracting 189 from 200 leaves us 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.

Advancing to step 12:
When dividing 110 by 21, we get 5 with a remainder of 5.
Record the quotient 5 as the next digit in the result. 
Result so far: 6348.238095
If we take 105 away from 110, we end up 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.

On to step 13:
50 divided by 21 is 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 6348.2380952
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.

On to step 14:
If we divide 80 by 21, we get 3 and a remainder of 17.
Record the quotient 3 as the next digit in the result. 
Result so far: 6348.23809523
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.

The final outcome is 6348.23809523, with a leftover of 1.7e-08.