312320 ÷ 99 
We're looking to find how many times 99 goes into 312320.

Going ahead to step 1:
99 can be fit into 3 0 times, resulting in a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 3 to get 3.
Fetch the next digit (1) from the dividend, attach it to 3 and continue: 31 / 99

Step 2:
99 goes into 31 0 times with a remainder of 31.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 31 and we're left with 31.
Bring next digit (2) of the dividend behind the 31 and repeat the process: 312 / 99

Moving on to step 3:
If we divide 312 by 99, we get 3 and a remainder of 15.
Use 3 as the next digit of our solution. 
Result so far: 3.0
Subtracting 297 from 312 leaves us with 15.
Include the next digit (3) from the dividend after 15, then repeat: 153 / 99

Step 4:
If we divide 153 by 99, we get 1 and a remainder of 54.
Use 1 as the next digit of our solution. 
Result so far: 31.0
Subtract 99 from 153 to get 54.
Append the next digit (2) from the dividend to 54 and continue with: 542 / 99

Going ahead to step 5:
The number 99 fits into 542 5 times, leaving a remainder of 47.
Record the quotient 5 as the next digit in the result. 
Result so far: 315.0
The remainder is 47 after subtracting 495 from 542.
Grab the next digit (0) from the dividend, add it to 47, then carry on: 470 / 99

On to step 6:
The number 99 fits into 470 4 times, leaving a remainder of 74.
The next digit of our result is 4. 
Result so far: 3154.0
Subtracting 396 from 470 leaves us with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Advancing to step 7:
99 goes into 740 7 times with a remainder of 47.
Use 7 as the next digit of our solution. 
Result so far: 3154.7
Subtracting 693 from 740 leaves us with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Going ahead to step 8:
If we divide 470 by 99, we get 4 and a remainder of 74.
Record the quotient 4 as the next digit in the result. 
Result so far: 3154.74
If we take 396 away from 470, we end up with 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 9:
When dividing 740 by 99, we get 7 with a remainder of 47.
Record the quotient 7 as the next digit in the result. 
Result so far: 3154.747
If we take 693 away from 740, we end up with 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Moving on to step 10:
470 divided by 99 is 4 with a remainder of 74.
The next digit of our result is 4. 
Result so far: 3154.7474
If we subtract 396 from 470, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Step 11:
99 can be fit into 740 7 times, resulting in a remainder of 47.
Write down 7 as next digit of the result. 
Result so far: 3154.74747
If we subtract 693 from 740, we get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

On to step 12:
If we divide 470 by 99, we get 4 and a remainder of 74.
Put 4 as the next digit of the answer. 
Result so far: 3154.747474
If we subtract 396 from 470, we get 74.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

Going ahead to step 13:
The number 99 fits into 740 7 times, leaving a remainder of 47.
The next digit of our result is 7. 
Result so far: 3154.7474747
Subtract 693 from 740 to get 47.
Since there are no more digits in the dividend, we add a zero to the remainder making it 470, and continue the process.

Let's proceed to step 14:
470 divided by 99 is 4 with a remainder of 74.
Record the quotient 4 as the next digit in the result. 
Result so far: 3154.74747474
The remainder is 74 after subtracting 396 from 470.
Since there are no more digits in the dividend, we add a zero to the remainder making it 740, and continue the process.

After the division, we end up with 3154.74747474 and a remainder of 7.4e-08.