We divide 810212 by 20
We want to divide 810212 by 20.

On to step 1:
When dividing 8 by 20, we get 0 with a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (1) from the dividend, attach it to 8 and continue: 81 / 20

Step 2:
The number 20 fits into 81 4 times, leaving a remainder of 1.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 80 from 81, we get 1.
Append the next digit (0) from the dividend to 1 and continue with: 10 / 20

Step 3:
20 can be fit into 10 0 times, resulting in a remainder of 10.
The next digit of our result is 0. 
Result so far: 40.0
Subtract 0 from 10 to get 10.
Bring next digit (2) of the dividend behind the 10 and repeat the process: 102 / 20

Step 4:
20 goes into 102 5 times with a remainder of 2.
The next digit of our result is 5. 
Result so far: 405.0
Deduct 100 from 102 and we're left with 2.
Bring next digit (1) of the dividend behind the 2 and repeat the process: 21 / 20

Step 5:
21 divided by 20 is 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 4051.0
Deduct 20 from 21 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 20

On to step 6:
20 can be fit into 12 0 times, resulting in a remainder of 12.
The number 0 becomes the next digit in our result. 
Result so far: 40510.0
If we subtract 0 from 12, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
120 divided by 20 is 6 with a remainder of 0.
The number 6 becomes the next digit in our result. 
Result so far: 40510.6
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:
20 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 40510.6
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 9:
The number 20 fits into 0 0 times, leaving a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 40510.6
The remainder is 0 after subtracting 0 from 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 quotient of the division is 40510.6, and the remainder is 0.0.