99216712 ÷ 315 
Our goal is to divide 99216712 by 315.

Step 1:
If we divide 9 by 315, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 315

Step 2:
315 can be fit into 99 0 times, resulting in a remainder of 99.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 99 after subtracting 0 from 99.
Include the next digit (2) from the dividend after 99, then repeat: 992 / 315

On to step 3:
992 divided by 315 is 3 with a remainder of 47.
The next digit of our result is 3. 
Result so far: 3.0
If we subtract 945 from 992, we get 47.
Include the next digit (1) from the dividend after 47, then repeat: 471 / 315

Let's proceed to step 4:
315 can be fit into 471 1 times, resulting in a remainder of 156.
Write down 1 as next digit of the result. 
Result so far: 31.0
If we take 315 away from 471, we end up with 156.
Bring next digit (6) of the dividend behind the 156 and repeat the process: 1566 / 315

Going ahead to step 5:
When dividing 1566 by 315, we get 4 with a remainder of 306.
Write down 4 as next digit of the result. 
Result so far: 314.0
The remainder is 306 after subtracting 1260 from 1566.
Grab the next digit (7) from the dividend, add it to 306, then carry on: 3067 / 315

Step 6:
315 can be fit into 3067 9 times, resulting in a remainder of 232.
Put 9 as the next digit of the answer. 
Result so far: 3149.0
Subtracting 2835 from 3067 leaves us with 232.
Fetch the next digit (1) from the dividend, attach it to 232 and continue: 2321 / 315

Let's proceed to step 7:
When dividing 2321 by 315, we get 7 with a remainder of 116.
Write down 7 as next digit of the result. 
Result so far: 31497.0
Deduct 2205 from 2321 and we're left with 116.
Include the next digit (2) from the dividend after 116, then repeat: 1162 / 315

Step 8:
315 can be fit into 1162 3 times, resulting in a remainder of 217.
The next digit of our result is 3. 
Result so far: 314973.0
The remainder is 217 after subtracting 945 from 1162.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2170, and continue the process.

Step 9:
The number 315 fits into 2170 6 times, leaving a remainder of 280.
Write down 6 as next digit of the result. 
Result so far: 314973.6
Deduct 1890 from 2170 and we're left with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 10:
315 goes into 2800 8 times with a remainder of 280.
Use 8 as the next digit of our solution. 
Result so far: 314973.68
Subtracting 2520 from 2800 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Step 11:
The number 315 fits into 2800 8 times, leaving a remainder of 280.
Write down 8 as next digit of the result. 
Result so far: 314973.688
Subtracting 2520 from 2800 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

The final result is 314973.688 with a remainder of 0.028.