We look at the division of 20009 by 90 
We want to divide 20009 by 90.

On to step 1:
If we divide 2 by 90, we get 0 and a remainder of 2.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Grab the next digit (0) from the dividend, add it to 2, then carry on: 20 / 90

Step 2:
90 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
Subtract 0 from 20 to get 20.
Fetch the next digit (0) from the dividend, attach it to 20 and continue: 200 / 90

On to step 3:
200 divided by 90 is 2 with a remainder of 20.
The next digit of our result is 2. 
Result so far: 2.0
If we subtract 180 from 200, we get 20.
Bring next digit (0) of the dividend behind the 20 and repeat the process: 200 / 90

Going ahead to step 4:
90 can be fit into 200 2 times, resulting in a remainder of 20.
The number 2 becomes the next digit in our result. 
Result so far: 22.0
Subtract 180 from 200 to get 20.
Grab the next digit (9) from the dividend, add it to 20, then carry on: 209 / 90

On to step 5:
When dividing 209 by 90, we get 2 with a remainder of 29.
Put 2 as the next digit of the answer. 
Result so far: 222.0
Subtracting 180 from 209 leaves us with 29.
Since there are no more digits in the dividend, we add a zero to the remainder making it 290, and continue the process.

Step 6:
90 can be fit into 290 3 times, resulting in a remainder of 20.
Put 3 as the next digit of the answer. 
Result so far: 222.3
Subtract 270 from 290 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.

Moving on to step 7:
200 divided by 90 is 2 with a remainder of 20.
Write down 2 as next digit of the result. 
Result so far: 222.32
Subtracting 180 from 200 leaves us with 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 8:
200 divided by 90 is 2 with a remainder of 20.
Put 2 as the next digit of the answer. 
Result so far: 222.322
Subtract 180 from 200 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.

After the division, we end up with 222.322 and a remainder of 0.002.