12404342 divided by 311 
We want to divide 12404342 by 311.

On to step 1:
311 can be fit into 1 0 times, resulting in a remainder of 1.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 1 and we're left with 1.
Fetch the next digit (2) from the dividend, attach it to 1 and continue: 12 / 311

On to step 2:
The number 311 fits into 12 0 times, leaving a remainder of 12.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 12 leaves us with 12.
Append the next digit (4) from the dividend to 12 and continue with: 124 / 311

On to step 3:
If we divide 124 by 311, we get 0 and a remainder of 124.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 124 leaves us with 124.
Append the next digit (0) from the dividend to 124 and continue with: 1240 / 311

On to step 4:
If we divide 1240 by 311, we get 3 and a remainder of 307.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Deduct 933 from 1240 and we're left with 307.
Grab the next digit (4) from the dividend, add it to 307, then carry on: 3074 / 311

Going ahead to step 5:
311 goes into 3074 9 times with a remainder of 275.
Put 9 as the next digit of the answer. 
Result so far: 39.0
Subtracting 2799 from 3074 leaves us with 275.
Grab the next digit (3) from the dividend, add it to 275, then carry on: 2753 / 311

Let's proceed to step 6:
If we divide 2753 by 311, we get 8 and a remainder of 265.
The next digit of our result is 8. 
Result so far: 398.0
The remainder is 265 after subtracting 2488 from 2753.
Append the next digit (4) from the dividend to 265 and continue with: 2654 / 311

Let's proceed to step 7:
311 goes into 2654 8 times with a remainder of 166.
The number 8 becomes the next digit in our result. 
Result so far: 3988.0
Subtract 2488 from 2654 to get 166.
Include the next digit (2) from the dividend after 166, then repeat: 1662 / 311

Let's proceed to step 8:
When dividing 1662 by 311, we get 5 with a remainder of 107.
Write down 5 as next digit of the result. 
Result so far: 39885.0
If we subtract 1555 from 1662, we get 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

Advancing to step 9:
When dividing 1070 by 311, we get 3 with a remainder of 137.
Put 3 as the next digit of the answer. 
Result so far: 39885.3
Subtracting 933 from 1070 leaves us with 137.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1370, and continue the process.

Moving on to step 10:
When dividing 1370 by 311, we get 4 with a remainder of 126.
Write down 4 as next digit of the result. 
Result so far: 39885.34
Subtract 1244 from 1370 to get 126.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1260, and continue the process.

On to step 11:
311 can be fit into 1260 4 times, resulting in a remainder of 16.
Write down 4 as next digit of the result. 
Result so far: 39885.344
If we subtract 1244 from 1260, we get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The quotient of the division is 39885.344, and the remainder is 0.0016.