Let's divide 20013 by 51
Let's see how many times 51 fits into 20013.

On to step 1:
51 can be fit into 2 0 times, resulting in a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtract 0 from 2 to get 2.
Bring next digit (0) of the dividend behind the 2 and repeat the process: 20 / 51

Step 2:
51 goes into 20 0 times with a remainder of 20.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 20 and we're left with 20.
Grab the next digit (0) from the dividend, add it to 20, then carry on: 200 / 51

Let's proceed to step 3:
The number 51 fits into 200 3 times, leaving a remainder of 47.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 153 from 200 to get 47.
Append the next digit (1) from the dividend to 47 and continue with: 471 / 51

Let's proceed to step 4:
471 divided by 51 is 9 with a remainder of 12.
Write down 9 as next digit of the result. 
Result so far: 39.0
Subtracting 459 from 471 leaves us with 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 51

Step 5:
If we divide 123 by 51, we get 2 and a remainder of 21.
The number 2 becomes the next digit in our result. 
Result so far: 392.0
If we subtract 102 from 123, we get 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

Going ahead to step 6:
If we divide 210 by 51, we get 4 and a remainder of 6.
The number 4 becomes the next digit in our result. 
Result so far: 392.4
If we subtract 204 from 210, we get 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 7:
When dividing 60 by 51, we get 1 with a remainder of 9.
The number 1 becomes the next digit in our result. 
Result so far: 392.41
Subtracting 51 from 60 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 8:
The number 51 fits into 90 1 times, leaving a remainder of 39.
Write down 1 as next digit of the result. 
Result so far: 392.411
The remainder is 39 after subtracting 51 from 90.
Since there are no more digits in the dividend, we add a zero to the remainder making it 390, and continue the process.

Our division results in 392.411 with a remaining 0.0039.