451136 ÷ 20 
We're looking to find how many times 20 goes into 451136.

Moving on to step 1:
If we divide 4 by 20, we get 0 and a remainder of 4.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Include the next digit (5) from the dividend after 4, then repeat: 45 / 20

Going ahead to step 2:
20 goes into 45 2 times with a remainder of 5.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
If we subtract 40 from 45, we get 5.
Take the next digit (1) from the dividend and append it to 5, then repeat: 51 / 20

Step 3:
51 divided by 20 is 2 with a remainder of 11.
Record the quotient 2 as the next digit in the result. 
Result so far: 22.0
Subtracting 40 from 51 leaves us with 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 20

Going ahead to step 4:
111 divided by 20 is 5 with a remainder of 11.
The next digit of our result is 5. 
Result so far: 225.0
The remainder is 11 after subtracting 100 from 111.
Append the next digit (3) from the dividend to 11 and continue with: 113 / 20

Step 5:
If we divide 113 by 20, we get 5 and a remainder of 13.
Use 5 as the next digit of our solution. 
Result so far: 2255.0
If we subtract 100 from 113, we get 13.
Grab the next digit (6) from the dividend, add it to 13, then carry on: 136 / 20

Step 6:
When dividing 136 by 20, we get 6 with a remainder of 16.
Write down 6 as next digit of the result. 
Result so far: 22556.0
Subtracting 120 from 136 leaves us with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Advancing to step 7:
When dividing 160 by 20, we get 8 with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 22556.8
Deduct 160 from 160 and we're left 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 8:
If we divide 0 by 20, we get 0 and a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 22556.8
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.

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: 22556.8
Subtract 0 from 0 to 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.

The final result is 22556.8 with a remainder of 0.0.