285159 ÷ 31 
Our goal is to divide 285159 by 31.

On to step 1:
If we divide 2 by 31, we get 0 and a remainder of 2.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 2 after subtracting 0 from 2.
Include the next digit (8) from the dividend after 2, then repeat: 28 / 31

On to step 2:
If we divide 28 by 31, we get 0 and a remainder of 28.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 28, we get 28.
Bring next digit (5) of the dividend behind the 28 and repeat the process: 285 / 31

Advancing to step 3:
The number 31 fits into 285 9 times, leaving a remainder of 6.
Record the quotient 9 as the next digit in the result. 
Result so far: 9.0
If we take 279 away from 285, we end up with 6.
Fetch the next digit (1) from the dividend, attach it to 6 and continue: 61 / 31

On to step 4:
61 divided by 31 is 1 with a remainder of 30.
Use 1 as the next digit of our solution. 
Result so far: 91.0
If we subtract 31 from 61, we get 30.
Include the next digit (5) from the dividend after 30, then repeat: 305 / 31

Moving on to step 5:
305 divided by 31 is 9 with a remainder of 26.
Use 9 as the next digit of our solution. 
Result so far: 919.0
If we take 279 away from 305, we end up with 26.
Fetch the next digit (9) from the dividend, attach it to 26 and continue: 269 / 31

Moving on to step 6:
31 can be fit into 269 8 times, resulting in a remainder of 21.
Put 8 as the next digit of the answer. 
Result so far: 9198.0
Subtracting 248 from 269 leaves us with 21.
Since there are no more digits in the dividend, we add a zero to the remainder making it 210, and continue the process.

On to step 7:
When dividing 210 by 31, we get 6 with a remainder of 24.
Record the quotient 6 as the next digit in the result. 
Result so far: 9198.6
Subtract 186 from 210 to get 24.
Since there are no more digits in the dividend, we add a zero to the remainder making it 240, and continue the process.

Going ahead to step 8:
The number 31 fits into 240 7 times, leaving a remainder of 23.
The next digit of our result is 7. 
Result so far: 9198.67
Subtract 217 from 240 to get 23.
Since there are no more digits in the dividend, we add a zero to the remainder making it 230, and continue the process.

Moving on to step 9:
31 can be fit into 230 7 times, resulting in a remainder of 13.
Write down 7 as next digit of the result. 
Result so far: 9198.677
Subtract 217 from 230 to get 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

After the division, we end up with 9198.677 and a remainder of 0.0013.