91404576 ÷ 728 
We want to figure out the number of times 91404576 can be divided by 728.

On to step 1:
When dividing 9 by 728, we get 0 with a remainder of 9.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 9, we get 9.
Bring next digit (1) of the dividend behind the 9 and repeat the process: 91 / 728

Step 2:
728 goes into 91 0 times with a remainder of 91.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 91, we end up with 91.
Include the next digit (4) from the dividend after 91, then repeat: 914 / 728

Step 3:
728 goes into 914 1 times with a remainder of 186.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtract 728 from 914 to get 186.
Include the next digit (0) from the dividend after 186, then repeat: 1860 / 728

Advancing to step 4:
If we divide 1860 by 728, we get 2 and a remainder of 404.
Record the quotient 2 as the next digit in the result. 
Result so far: 12.0
If we take 1456 away from 1860, we end up with 404.
Fetch the next digit (4) from the dividend, attach it to 404 and continue: 4044 / 728

Going ahead to step 5:
The number 728 fits into 4044 5 times, leaving a remainder of 404.
Put 5 as the next digit of the answer. 
Result so far: 125.0
Subtract 3640 from 4044 to get 404.
Append the next digit (5) from the dividend to 404 and continue with: 4045 / 728

Let's proceed to step 6:
728 goes into 4045 5 times with a remainder of 405.
Write down 5 as next digit of the result. 
Result so far: 1255.0
If we subtract 3640 from 4045, we get 405.
Bring next digit (7) of the dividend behind the 405 and repeat the process: 4057 / 728

On to step 7:
728 can be fit into 4057 5 times, resulting in a remainder of 417.
Use 5 as the next digit of our solution. 
Result so far: 12555.0
The remainder is 417 after subtracting 3640 from 4057.
Take the next digit (6) from the dividend and append it to 417, then repeat: 4176 / 728

Moving on to step 8:
4176 divided by 728 is 5 with a remainder of 536.
Put 5 as the next digit of the answer. 
Result so far: 125555.0
The remainder is 536 after subtracting 3640 from 4176.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Advancing to step 9:
When dividing 5360 by 728, we get 7 with a remainder of 264.
The next digit of our result is 7. 
Result so far: 125555.7
Subtract 5096 from 5360 to get 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

On to step 10:
2640 divided by 728 is 3 with a remainder of 456.
Put 3 as the next digit of the answer. 
Result so far: 125555.73
Deduct 2184 from 2640 and we're left with 456.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Let's proceed to step 11:
728 goes into 4560 6 times with a remainder of 192.
Put 6 as the next digit of the answer. 
Result so far: 125555.736
Subtract 4368 from 4560 to get 192.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1920, and continue the process.

On to step 12:
728 goes into 1920 2 times with a remainder of 464.
The next digit of our result is 2. 
Result so far: 125555.7362
Subtracting 1456 from 1920 leaves us with 464.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4640, and continue the process.

On to step 13:
The number 728 fits into 4640 6 times, leaving a remainder of 272.
The number 6 becomes the next digit in our result. 
Result so far: 125555.73626
The remainder is 272 after subtracting 4368 from 4640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2720, and continue the process.

Advancing to step 14:
2720 divided by 728 is 3 with a remainder of 536.
Use 3 as the next digit of our solution. 
Result so far: 125555.736263
Subtracting 2184 from 2720 leaves us with 536.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5360, and continue the process.

Going ahead to step 15:
The number 728 fits into 5360 7 times, leaving a remainder of 264.
The next digit of our result is 7. 
Result so far: 125555.7362637
Deduct 5096 from 5360 and we're left with 264.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2640, and continue the process.

Step 16:
728 goes into 2640 3 times with a remainder of 456.
Write down 3 as next digit of the result. 
Result so far: 125555.73626373
The remainder is 456 after subtracting 2184 from 2640.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4560, and continue the process.

Our division results in 125555.73626373 with a remaining 4.56e-07.