We're dividing 31312501 by 12 
Let's see how many times 12 fits into 31312501.

Going ahead to step 1:
The number 12 fits into 3 0 times, leaving a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Take the next digit (1) from the dividend and append it to 3, then repeat: 31 / 12

Moving on to step 2:
12 can be fit into 31 2 times, resulting in a remainder of 7.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Subtract 24 from 31 to get 7.
Append the next digit (3) from the dividend to 7 and continue with: 73 / 12

Going ahead to step 3:
If we divide 73 by 12, we get 6 and a remainder of 1.
Write down 6 as next digit of the result. 
Result so far: 26.0
Subtract 72 from 73 to get 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 12

Going ahead to step 4:
If we divide 11 by 12, we get 0 and a remainder of 11.
Put 0 as the next digit of the answer. 
Result so far: 260.0
Deduct 0 from 11 and we're left with 11.
Append the next digit (2) from the dividend to 11 and continue with: 112 / 12

Let's proceed to step 5:
When dividing 112 by 12, we get 9 with a remainder of 4.
Use 9 as the next digit of our solution. 
Result so far: 2609.0
If we take 108 away from 112, we end up with 4.
Bring next digit (5) of the dividend behind the 4 and repeat the process: 45 / 12

Going ahead to step 6:
45 divided by 12 is 3 with a remainder of 9.
Use 3 as the next digit of our solution. 
Result so far: 26093.0
Subtracting 36 from 45 leaves us with 9.
Fetch the next digit (0) from the dividend, attach it to 9 and continue: 90 / 12

Moving on to step 7:
The number 12 fits into 90 7 times, leaving a remainder of 6.
Use 7 as the next digit of our solution. 
Result so far: 260937.0
If we subtract 84 from 90, we get 6.
Take the next digit (1) from the dividend and append it to 6, then repeat: 61 / 12

On to step 8:
When dividing 61 by 12, we get 5 with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 2609375.0
If we subtract 60 from 61, we get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

On to step 9:
The number 12 fits into 10 0 times, leaving a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 2609375.0
If we subtract 0 from 10, we 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.

On to step 10:
The number 12 fits into 100 8 times, leaving a remainder of 4.
The number 8 becomes the next digit in our result. 
Result so far: 2609375.08
If we subtract 96 from 100, we get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 11:
The number 12 fits into 40 3 times, leaving a remainder of 4.
Put 3 as the next digit of the answer. 
Result so far: 2609375.083
Subtract 36 from 40 to get 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Let's proceed to step 12:
40 divided by 12 is 3 with a remainder of 4.
Record the quotient 3 as the next digit in the result. 
Result so far: 2609375.0833
The remainder is 4 after subtracting 36 from 40.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

The final result is 2609375.0833 with a remainder of 4e-05.