We look at the division of 451315 by 20 
Our goal is to divide 451315 by 20.

Moving on to step 1:
20 goes into 4 0 times with a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 4, we end up with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 20

Advancing to step 2:
The number 20 fits into 45 2 times, leaving a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 2.0
Subtract 40 from 45 to get 5.
Grab the next digit (1) from the dividend, add it to 5, then carry on: 51 / 20

Step 3:
If we divide 51 by 20, we get 2 and a remainder of 11.
The next digit of our result is 2. 
Result so far: 22.0
Subtracting 40 from 51 leaves us with 11.
Take the next digit (3) from the dividend and append it to 11, then repeat: 113 / 20

On to step 4:
20 can be fit into 113 5 times, resulting in a remainder of 13.
Write down 5 as next digit of the result. 
Result so far: 225.0
Subtracting 100 from 113 leaves us with 13.
Fetch the next digit (1) from the dividend, attach it to 13 and continue: 131 / 20

Moving on to step 5:
The number 20 fits into 131 6 times, leaving a remainder of 11.
The number 6 becomes the next digit in our result. 
Result so far: 2256.0
Deduct 120 from 131 and we're left with 11.
Fetch the next digit (5) from the dividend, attach it to 11 and continue: 115 / 20

On to step 6:
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: 22565.0
Subtracting 100 from 115 leaves us with 15.
Since there are no more digits in the dividend, we add a zero to the remainder making it 150, and continue the process.

Step 7:
150 divided by 20 is 7 with a remainder of 10.
The next digit of our result is 7. 
Result so far: 22565.7
If we subtract 140 from 150, we get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

On to step 8:
100 divided by 20 is 5 with a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 22565.75
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.

Going ahead to step 9:
20 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 22565.75
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.

Advancing to step 10:
If we divide 0 by 20, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 22565.75
Subtracting 0 from 0 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.

Our division results in 22565.75 with a remaining 0.0.