We're dividing 909579 by 20 
Let's see how many times 20 fits into 909579.

Step 1:
If we divide 9 by 20, we get 0 and a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 9 and we're left with 9.
Grab the next digit (0) from the dividend, add it to 9, then carry on: 90 / 20

On to step 2:
When dividing 90 by 20, we get 4 with a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 4.0
If we take 80 away from 90, we end up with 10.
Append the next digit (9) from the dividend to 10 and continue with: 109 / 20

Step 3:
If we divide 109 by 20, we get 5 and a remainder of 9.
Put 5 as the next digit of the answer. 
Result so far: 45.0
Subtract 100 from 109 to get 9.
Include the next digit (5) from the dividend after 9, then repeat: 95 / 20

On to step 4:
The number 20 fits into 95 4 times, leaving a remainder of 15.
Write down 4 as next digit of the result. 
Result so far: 454.0
Subtracting 80 from 95 leaves us with 15.
Bring next digit (7) of the dividend behind the 15 and repeat the process: 157 / 20

Moving on to step 5:
When dividing 157 by 20, we get 7 with a remainder of 17.
Write down 7 as next digit of the result. 
Result so far: 4547.0
Deduct 140 from 157 and we're left with 17.
Grab the next digit (9) from the dividend, add it to 17, then carry on: 179 / 20

Moving on to step 6:
If we divide 179 by 20, we get 8 and a remainder of 19.
Record the quotient 8 as the next digit in the result. 
Result so far: 45478.0
If we subtract 160 from 179, we get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Advancing to step 7:
20 goes into 190 9 times with a remainder of 10.
The next digit of our result is 9. 
Result so far: 45478.9
Subtracting 180 from 190 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
20 goes into 100 5 times with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 45478.95
Subtracting 100 from 100 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
0 divided by 20 is 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 45478.95
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 10:
When dividing 0 by 20, we get 0 with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 45478.95
If we take 0 away from 0, we end up with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 45478.95, with a leftover of 0.0.