85799 divided by 20 
Our goal is to divide 85799 by 20.

On to step 1:
The number 20 fits into 8 0 times, leaving a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Grab the next digit (5) from the dividend, add it to 8, then carry on: 85 / 20

Step 2:
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: 4.0
If we subtract 80 from 85, we get 5.
Bring next digit (7) of the dividend behind the 5 and repeat the process: 57 / 20

Advancing to step 3:
57 divided by 20 is 2 with a remainder of 17.
Put 2 as the next digit of the answer. 
Result so far: 42.0
Subtract 40 from 57 to get 17.
Append the next digit (9) from the dividend to 17 and continue with: 179 / 20

Going ahead to step 4:
If we divide 179 by 20, we get 8 and a remainder of 19.
The number 8 becomes the next digit in our result. 
Result so far: 428.0
Subtracting 160 from 179 leaves us with 19.
Bring next digit (9) of the dividend behind the 19 and repeat the process: 199 / 20

Going ahead to step 5:
If we divide 199 by 20, we get 9 and a remainder of 19.
The number 9 becomes the next digit in our result. 
Result so far: 4289.0
If we take 180 away from 199, we end up with 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Moving on to step 6:
If we divide 190 by 20, we get 9 and a remainder of 10.
Put 9 as the next digit of the answer. 
Result so far: 4289.9
Deduct 180 from 190 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Moving on to step 7:
The number 20 fits into 100 5 times, leaving a remainder of 0.
Write down 5 as next digit of the result. 
Result so far: 4289.95
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.

Let's proceed to step 8:
If we divide 0 by 20, we get 0 and a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 4289.95
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.

Moving on to step 9:
20 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 4289.95
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.

The quotient of the division is 4289.95, and the remainder is 0.0.