We look at the division of 99120999 by 907 
We want to figure out the number of times 99120999 can be divided by 907.

Advancing to step 1:
9 divided by 907 is 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Take the next digit (9) from the dividend and append it to 9, then repeat: 99 / 907

On to step 2:
907 goes into 99 0 times with a remainder of 99.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 99 and we're left with 99.
Append the next digit (1) from the dividend to 99 and continue with: 991 / 907

Advancing to step 3:
If we divide 991 by 907, we get 1 and a remainder of 84.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 907 from 991 and we're left with 84.
Append the next digit (2) from the dividend to 84 and continue with: 842 / 907

Let's proceed to step 4:
When dividing 842 by 907, we get 0 with a remainder of 842.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtract 0 from 842 to get 842.
Grab the next digit (0) from the dividend, add it to 842, then carry on: 8420 / 907

Advancing to step 5:
When dividing 8420 by 907, we get 9 with a remainder of 257.
Use 9 as the next digit of our solution. 
Result so far: 109.0
If we take 8163 away from 8420, we end up with 257.
Take the next digit (9) from the dividend and append it to 257, then repeat: 2579 / 907

Moving on to step 6:
2579 divided by 907 is 2 with a remainder of 765.
Use 2 as the next digit of our solution. 
Result so far: 1092.0
Deduct 1814 from 2579 and we're left with 765.
Grab the next digit (9) from the dividend, add it to 765, then carry on: 7659 / 907

Advancing to step 7:
When dividing 7659 by 907, we get 8 with a remainder of 403.
Use 8 as the next digit of our solution. 
Result so far: 10928.0
Subtracting 7256 from 7659 leaves us with 403.
Include the next digit (9) from the dividend after 403, then repeat: 4039 / 907

On to step 8:
When dividing 4039 by 907, we get 4 with a remainder of 411.
Put 4 as the next digit of the answer. 
Result so far: 109284.0
Subtracting 3628 from 4039 leaves us with 411.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4110, and continue the process.

Advancing to step 9:
907 goes into 4110 4 times with a remainder of 482.
The number 4 becomes the next digit in our result. 
Result so far: 109284.4
If we take 3628 away from 4110, we end up with 482.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4820, and continue the process.

Let's proceed to step 10:
When dividing 4820 by 907, we get 5 with a remainder of 285.
Write down 5 as next digit of the result. 
Result so far: 109284.45
If we take 4535 away from 4820, we end up with 285.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2850, and continue the process.

Let's proceed to step 11:
If we divide 2850 by 907, we get 3 and a remainder of 129.
Use 3 as the next digit of our solution. 
Result so far: 109284.453
Subtracting 2721 from 2850 leaves us with 129.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1290, and continue the process.

Step 12:
1290 divided by 907 is 1 with a remainder of 383.
Put 1 as the next digit of the answer. 
Result so far: 109284.4531
Deduct 907 from 1290 and we're left with 383.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3830, and continue the process.

On to step 13:
3830 divided by 907 is 4 with a remainder of 202.
Use 4 as the next digit of our solution. 
Result so far: 109284.45314
If we subtract 3628 from 3830, we get 202.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2020, and continue the process.

On to step 14:
907 goes into 2020 2 times with a remainder of 206.
Use 2 as the next digit of our solution. 
Result so far: 109284.453142
Deduct 1814 from 2020 and we're left with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

On to step 15:
If we divide 2060 by 907, we get 2 and a remainder of 246.
The next digit of our result is 2. 
Result so far: 109284.4531422
Subtract 1814 from 2060 to get 246.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2460, and continue the process.

Our division results in 109284.4531422 with a remaining 2.46e-06.