850511 ÷ 20 
We want to divide 850511 by 20.

Let's proceed to step 1:
20 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 20

On to step 2:
85 divided by 20 is 4 with a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 4.0
Subtracting 80 from 85 leaves us with 5.
Bring next digit (0) of the dividend behind the 5 and repeat the process: 50 / 20

Let's proceed to step 3:
If we divide 50 by 20, we get 2 and a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 42.0
If we take 40 away from 50, we end up with 10.
Bring next digit (5) of the dividend behind the 10 and repeat the process: 105 / 20

On to step 4:
20 goes into 105 5 times with a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 425.0
If we take 100 away from 105, we end up with 5.
Fetch the next digit (1) from the dividend, attach it to 5 and continue: 51 / 20

On to step 5:
51 divided by 20 is 2 with a remainder of 11.
The next digit of our result is 2. 
Result so far: 4252.0
Subtract 40 from 51 to get 11.
Append the next digit (1) from the dividend to 11 and continue with: 111 / 20

Advancing to step 6:
The number 20 fits into 111 5 times, leaving a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 42525.0
Deduct 100 from 111 and we're left with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

On to step 7:
When dividing 110 by 20, we get 5 with a remainder of 10.
The next digit of our result is 5. 
Result so far: 42525.5
Subtract 100 from 110 to 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.

Going ahead to step 8:
100 divided by 20 is 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 42525.55
The remainder is 0 after subtracting 100 from 100.
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 42525.55 with a remainder of 0.0.