99172200 ÷ 307 
We want to figure out the number of times 99172200 can be divided by 307.

Moving on to step 1:
9 divided by 307 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 9 after subtracting 0 from 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 307

Going ahead to step 2:
The number 307 fits into 99 0 times, leaving a remainder of 99.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 99 after subtracting 0 from 99.
Bring next digit (1) of the dividend behind the 99 and repeat the process: 991 / 307

Step 3:
The number 307 fits into 991 3 times, leaving a remainder of 70.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Subtract 921 from 991 to get 70.
Fetch the next digit (7) from the dividend, attach it to 70 and continue: 707 / 307

On to step 4:
If we divide 707 by 307, we get 2 and a remainder of 93.
Write down 2 as next digit of the result. 
Result so far: 32.0
Subtracting 614 from 707 leaves us with 93.
Bring next digit (2) of the dividend behind the 93 and repeat the process: 932 / 307

Advancing to step 5:
932 divided by 307 is 3 with a remainder of 11.
Record the quotient 3 as the next digit in the result. 
Result so far: 323.0
If we subtract 921 from 932, we get 11.
Take the next digit (2) from the dividend and append it to 11, then repeat: 112 / 307

Step 6:
The number 307 fits into 112 0 times, leaving a remainder of 112.
Record the quotient 0 as the next digit in the result. 
Result so far: 3230.0
If we take 0 away from 112, we end up with 112.
Append the next digit (0) from the dividend to 112 and continue with: 1120 / 307

Step 7:
If we divide 1120 by 307, we get 3 and a remainder of 199.
Record the quotient 3 as the next digit in the result. 
Result so far: 32303.0
Deduct 921 from 1120 and we're left with 199.
Grab the next digit (0) from the dividend, add it to 199, then carry on: 1990 / 307

On to step 8:
307 can be fit into 1990 6 times, resulting in a remainder of 148.
Record the quotient 6 as the next digit in the result. 
Result so far: 323036.0
The remainder is 148 after subtracting 1842 from 1990.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1480, and continue the process.

On to step 9:
If we divide 1480 by 307, we get 4 and a remainder of 252.
Use 4 as the next digit of our solution. 
Result so far: 323036.4
The remainder is 252 after subtracting 1228 from 1480.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2520, and continue the process.

Going ahead to step 10:
307 goes into 2520 8 times with a remainder of 64.
Write down 8 as next digit of the result. 
Result so far: 323036.48
The remainder is 64 after subtracting 2456 from 2520.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

Going ahead to step 11:
The number 307 fits into 640 2 times, leaving a remainder of 26.
The number 2 becomes the next digit in our result. 
Result so far: 323036.482
If we subtract 614 from 640, we get 26.
Since there are no more digits in the dividend, we add a zero to the remainder making it 260, and continue the process.

Moving on to step 12:
If we divide 260 by 307, we get 0 and a remainder of 260.
Record the quotient 0 as the next digit in the result. 
Result so far: 323036.482
Subtract 0 from 260 to get 260.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2600, and continue the process.

Advancing to step 13:
2600 divided by 307 is 8 with a remainder of 144.
Write down 8 as next digit of the result. 
Result so far: 323036.48208
If we take 2456 away from 2600, we end up with 144.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1440, and continue the process.

Let's proceed to step 14:
307 can be fit into 1440 4 times, resulting in a remainder of 212.
Put 4 as the next digit of the answer. 
Result so far: 323036.482084
The remainder is 212 after subtracting 1228 from 1440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2120, and continue the process.

On to step 15:
307 can be fit into 2120 6 times, resulting in a remainder of 278.
The number 6 becomes the next digit in our result. 
Result so far: 323036.4820846
The remainder is 278 after subtracting 1842 from 2120.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2780, and continue the process.

On to step 16:
2780 divided by 307 is 9 with a remainder of 17.
Write down 9 as next digit of the result. 
Result so far: 323036.48208469
If we subtract 2763 from 2780, we get 17.
Since there are no more digits in the dividend, we add a zero to the remainder making it 170, and continue the process.

In conclusion, the division gives 323036.48208469 with a balance of 1.7e-08.