We're dividing 312285 by 24 
We want to divide 312285 by 24.

Step 1:
The number 24 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 3 and we're left with 3.
Include the next digit (1) from the dividend after 3, then repeat: 31 / 24

Moving on to step 2:
24 can be fit into 31 1 times, resulting in a remainder of 7.
The next digit of our result is 1. 
Result so far: 1.0
The remainder is 7 after subtracting 24 from 31.
Append the next digit (2) from the dividend to 7 and continue with: 72 / 24

Going ahead to step 3:
When dividing 72 by 24, we get 3 with a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 13.0
If we subtract 72 from 72, we get 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 24

Advancing to step 4:
2 divided by 24 is 0 with a remainder of 2.
Write down 0 as next digit of the result. 
Result so far: 130.0
Subtract 0 from 2 to get 2.
Grab the next digit (8) from the dividend, add it to 2, then carry on: 28 / 24

Step 5:
If we divide 28 by 24, we get 1 and a remainder of 4.
The number 1 becomes the next digit in our result. 
Result so far: 1301.0
The remainder is 4 after subtracting 24 from 28.
Grab the next digit (5) from the dividend, add it to 4, then carry on: 45 / 24

Step 6:
If we divide 45 by 24, we get 1 and a remainder of 21.
The number 1 becomes the next digit in our result. 
Result so far: 13011.0
Deduct 24 from 45 and we're left 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.

Advancing to step 7:
When dividing 210 by 24, we get 8 with a remainder of 18.
Put 8 as the next digit of the answer. 
Result so far: 13011.8
Deduct 192 from 210 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Let's proceed to step 8:
If we divide 180 by 24, we get 7 and a remainder of 12.
Record the quotient 7 as the next digit in the result. 
Result so far: 13011.87
Deduct 168 from 180 and we're left with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Moving on to step 9:
If we divide 120 by 24, we get 5 and a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 13011.875
Subtract 120 from 120 to 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.

On to step 10:
24 can be fit into 0 0 times, resulting in a remainder of 0.
The next digit of our result is 0. 
Result so far: 13011.875
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.

Let's proceed to step 11:
The number 24 fits into 0 0 times, leaving a remainder of 0.
The next digit of our result is 0. 
Result so far: 13011.875
If we subtract 0 from 0, 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.

The final result is 13011.875 with a remainder of 0.0.