We look at the division of 20205 by 81 
Let's see how many times 81 fits into 20205.

On to step 1:
2 divided by 81 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 2, we end up with 2.
Append the next digit (0) from the dividend to 2 and continue with: 20 / 81

Step 2:
20 divided by 81 is 0 with 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.
Fetch the next digit (2) from the dividend, attach it to 20 and continue: 202 / 81

Step 3:
The number 81 fits into 202 2 times, leaving a remainder of 40.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
Deduct 162 from 202 and we're left with 40.
Grab the next digit (0) from the dividend, add it to 40, then carry on: 400 / 81

Moving on to step 4:
The number 81 fits into 400 4 times, leaving a remainder of 76.
Put 4 as the next digit of the answer. 
Result so far: 24.0
Subtracting 324 from 400 leaves us with 76.
Bring next digit (5) of the dividend behind the 76 and repeat the process: 765 / 81

On to step 5:
81 goes into 765 9 times with a remainder of 36.
Write down 9 as next digit of the result. 
Result so far: 249.0
Subtract 729 from 765 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Advancing to step 6:
When dividing 360 by 81, we get 4 with a remainder of 36.
Record the quotient 4 as the next digit in the result. 
Result so far: 249.4
Subtract 324 from 360 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Moving on to step 7:
When dividing 360 by 81, we get 4 with a remainder of 36.
The next digit of our result is 4. 
Result so far: 249.44
If we take 324 away from 360, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

The quotient of the division is 249.44, and the remainder is 0.036.