91403280 ÷ 990 
We want to figure out the number of times 91403280 can be divided by 990.

Step 1:
If we divide 9 by 990, we get 0 and a remainder of 9.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 9 leaves us with 9.
Append the next digit (1) from the dividend to 9 and continue with: 91 / 990

On to step 2:
When dividing 91 by 990, we get 0 with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 91 to get 91.
Take the next digit (4) from the dividend and append it to 91, then repeat: 914 / 990

Moving on to step 3:
The number 990 fits into 914 0 times, leaving a remainder of 914.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 914 leaves us with 914.
Fetch the next digit (0) from the dividend, attach it to 914 and continue: 9140 / 990

Step 4:
990 goes into 9140 9 times with a remainder of 230.
Write down 9 as next digit of the result. 
Result so far: 9.0
If we subtract 8910 from 9140, we get 230.
Bring next digit (3) of the dividend behind the 230 and repeat the process: 2303 / 990

Let's proceed to step 5:
990 goes into 2303 2 times with a remainder of 323.
The next digit of our result is 2. 
Result so far: 92.0
Deduct 1980 from 2303 and we're left with 323.
Append the next digit (2) from the dividend to 323 and continue with: 3232 / 990

On to step 6:
If we divide 3232 by 990, we get 3 and a remainder of 262.
The next digit of our result is 3. 
Result so far: 923.0
If we subtract 2970 from 3232, we get 262.
Fetch the next digit (8) from the dividend, attach it to 262 and continue: 2628 / 990

On to step 7:
990 goes into 2628 2 times with a remainder of 648.
The next digit of our result is 2. 
Result so far: 9232.0
If we subtract 1980 from 2628, we get 648.
Append the next digit (0) from the dividend to 648 and continue with: 6480 / 990

Going ahead to step 8:
6480 divided by 990 is 6 with a remainder of 540.
The next digit of our result is 6. 
Result so far: 92326.0
Subtracting 5940 from 6480 leaves us with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Step 9:
5400 divided by 990 is 5 with a remainder of 450.
Use 5 as the next digit of our solution. 
Result so far: 92326.5
If we take 4950 away from 5400, we end up with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Let's proceed to step 10:
The number 990 fits into 4500 4 times, leaving a remainder of 540.
Write down 4 as next digit of the result. 
Result so far: 92326.54
The remainder is 540 after subtracting 3960 from 4500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Moving on to step 11:
If we divide 5400 by 990, we get 5 and a remainder of 450.
Use 5 as the next digit of our solution. 
Result so far: 92326.545
The remainder is 450 after subtracting 4950 from 5400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Step 12:
The number 990 fits into 4500 4 times, leaving a remainder of 540.
Record the quotient 4 as the next digit in the result. 
Result so far: 92326.5454
The remainder is 540 after subtracting 3960 from 4500.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

Step 13:
When dividing 5400 by 990, we get 5 with a remainder of 450.
Put 5 as the next digit of the answer. 
Result so far: 92326.54545
Deduct 4950 from 5400 and we're left with 450.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

Step 14:
990 goes into 4500 4 times with a remainder of 540.
Use 4 as the next digit of our solution. 
Result so far: 92326.545454
Subtract 3960 from 4500 to get 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

On to step 15:
990 can be fit into 5400 5 times, resulting in a remainder of 450.
The next digit of our result is 5. 
Result so far: 92326.5454545
The remainder is 450 after subtracting 4950 from 5400.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4500, and continue the process.

On to step 16:
When dividing 4500 by 990, we get 4 with a remainder of 540.
Write down 4 as next digit of the result. 
Result so far: 92326.54545454
If we take 3960 away from 4500, we end up with 540.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5400, and continue the process.

The final outcome is 92326.54545454, with a leftover of 5.4e-07.