We look at the division of 20104155 by 663 
We want to divide 20104155 by 663.

Advancing to step 1:
If we divide 2 by 663, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 2 leaves us with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 663

Step 2:
663 can be fit into 20 0 times, resulting in a remainder of 20.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 20 after subtracting 0 from 20.
Bring next digit (1) of the dividend behind the 20 and repeat the process: 201 / 663

Let's proceed to step 3:
663 can be fit into 201 0 times, resulting in a remainder of 201.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 201 after subtracting 0 from 201.
Append the next digit (0) from the dividend to 201 and continue with: 2010 / 663

Let's proceed to step 4:
2010 divided by 663 is 3 with a remainder of 21.
Record the quotient 3 as the next digit in the result. 
Result so far: 3.0
If we take 1989 away from 2010, we end up with 21.
Append the next digit (4) from the dividend to 21 and continue with: 214 / 663

Step 5:
663 goes into 214 0 times with a remainder of 214.
Record the quotient 0 as the next digit in the result. 
Result so far: 30.0
Subtract 0 from 214 to get 214.
Fetch the next digit (1) from the dividend, attach it to 214 and continue: 2141 / 663

Going ahead to step 6:
663 goes into 2141 3 times with a remainder of 152.
Write down 3 as next digit of the result. 
Result so far: 303.0
Subtracting 1989 from 2141 leaves us with 152.
Fetch the next digit (5) from the dividend, attach it to 152 and continue: 1525 / 663

Going ahead to step 7:
When dividing 1525 by 663, we get 2 with a remainder of 199.
Write down 2 as next digit of the result. 
Result so far: 3032.0
Subtract 1326 from 1525 to get 199.
Fetch the next digit (5) from the dividend, attach it to 199 and continue: 1995 / 663

Advancing to step 8:
663 goes into 1995 3 times with a remainder of 6.
The next digit of our result is 3. 
Result so far: 30323.0
Subtracting 1989 from 1995 leaves us 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.

Moving on to step 9:
60 divided by 663 is 0 with a remainder of 60.
Use 0 as the next digit of our solution. 
Result so far: 30323.0
The remainder is 60 after subtracting 0 from 60.
Since there are no more digits in the dividend, we add a zero to the remainder making it 600, and continue the process.

On to step 10:
663 can be fit into 600 0 times, resulting in a remainder of 600.
Put 0 as the next digit of the answer. 
Result so far: 30323.0
If we take 0 away from 600, we end up with 600.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6000, and continue the process.

The final result is 30323.0 with a remainder of 0.6.