We're dividing 915191 by 20 
Our goal is to divide 915191 by 20.

Step 1:
The number 20 fits into 9 0 times, leaving a remainder of 9.
The next digit of our result is 0. 
Result so far: 0.0
If we take 0 away from 9, we end up with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 20

Step 2:
If we divide 91 by 20, we get 4 and a remainder of 11.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Deduct 80 from 91 and we're left with 11.
Grab the next digit (5) from the dividend, add it to 11, then carry on: 115 / 20

Let's proceed to step 3:
If we divide 115 by 20, we get 5 and a remainder of 15.
The next digit of our result is 5. 
Result so far: 45.0
The remainder is 15 after subtracting 100 from 115.
Fetch the next digit (1) from the dividend, attach it to 15 and continue: 151 / 20

On to step 4:
When dividing 151 by 20, we get 7 with a remainder of 11.
The number 7 becomes the next digit in our result. 
Result so far: 457.0
If we subtract 140 from 151, we get 11.
Grab the next digit (9) from the dividend, add it to 11, then carry on: 119 / 20

Advancing to step 5:
If we divide 119 by 20, we get 5 and a remainder of 19.
The number 5 becomes the next digit in our result. 
Result so far: 4575.0
Subtract 100 from 119 to get 19.
Grab the next digit (1) from the dividend, add it to 19, then carry on: 191 / 20

Going ahead to step 6:
191 divided by 20 is 9 with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 45759.0
Subtract 180 from 191 to get 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
20 can be fit into 110 5 times, resulting in a remainder of 10.
Put 5 as the next digit of the answer. 
Result so far: 45759.5
Subtracting 100 from 110 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:
When dividing 100 by 20, we get 5 with a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 45759.55
If we take 100 away from 100, 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.

After the division, we end up with 45759.55 and a remainder of 0.0.