We look at the division of 861285 by 20 
We want to divide 861285 by 20.

On to step 1:
The number 20 fits into 8 0 times, leaving a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 20

On to step 2:
20 can be fit into 86 4 times, resulting in a remainder of 6.
Put 4 as the next digit of the answer. 
Result so far: 4.0
The remainder is 6 after subtracting 80 from 86.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 20

Advancing to step 3:
When dividing 61 by 20, we get 3 with a remainder of 1.
Record the quotient 3 as the next digit in the result. 
Result so far: 43.0
The remainder is 1 after subtracting 60 from 61.
Grab the next digit (2) from the dividend, add it to 1, then carry on: 12 / 20

Going ahead to step 4:
The number 20 fits into 12 0 times, leaving a remainder of 12.
Put 0 as the next digit of the answer. 
Result so far: 430.0
If we subtract 0 from 12, we get 12.
Append the next digit (8) from the dividend to 12 and continue with: 128 / 20

Going ahead to step 5:
The number 20 fits into 128 6 times, leaving a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 4306.0
The remainder is 8 after subtracting 120 from 128.
Bring next digit (5) of the dividend behind the 8 and repeat the process: 85 / 20

On to step 6:
20 can be fit into 85 4 times, resulting in a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 43064.0
If we take 80 away from 85, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Let's proceed to step 7:
20 can be fit into 50 2 times, resulting in a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 43064.2
The remainder is 10 after subtracting 40 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Advancing to step 8:
100 divided by 20 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 43064.25
Subtracting 100 from 100 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.

Advancing to step 9:
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: 43064.25
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.

Advancing to step 10:
20 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 43064.25
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.

After the division, we end up with 43064.25 and a remainder of 0.0.