We divide 811612 by 20
Let's see how many times 20 fits into 811612.

Advancing to step 1:
When dividing 8 by 20, we get 0 with a remainder of 8.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Grab the next digit (1) from the dividend, add it to 8, then carry on: 81 / 20

Let's proceed to step 2:
If we divide 81 by 20, we get 4 and a remainder of 1.
Write down 4 as next digit of the result. 
Result so far: 4.0
If we subtract 80 from 81, we get 1.
Include the next digit (1) from the dividend after 1, then repeat: 11 / 20

On to step 3:
20 goes into 11 0 times with a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 40.0
If we take 0 away from 11, we end up with 11.
Grab the next digit (6) from the dividend, add it to 11, then carry on: 116 / 20

Advancing to step 4:
The number 20 fits into 116 5 times, leaving a remainder of 16.
The number 5 becomes the next digit in our result. 
Result so far: 405.0
Subtract 100 from 116 to get 16.
Grab the next digit (1) from the dividend, add it to 16, then carry on: 161 / 20

Advancing to step 5:
If we divide 161 by 20, we get 8 and a remainder of 1.
Put 8 as the next digit of the answer. 
Result so far: 4058.0
Subtract 160 from 161 to get 1.
Include the next digit (2) from the dividend after 1, then repeat: 12 / 20

Going ahead to step 6:
12 divided by 20 is 0 with a remainder of 12.
The next digit of our result is 0. 
Result so far: 40580.0
Subtracting 0 from 12 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 7:
20 can be fit into 120 6 times, resulting in a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 40580.6
If we subtract 120 from 120, 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.

Going ahead to step 8:
The number 20 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 40580.6
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.

Let's proceed to step 9:
20 goes into 0 0 times with a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 40580.6
Deduct 0 from 0 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.

Our division results in 40580.6 with a remaining 0.0.