We divide 66286391 by 728
We want to figure out the number of times 66286391 can be divided by 728.

Going ahead to step 1:
The number 728 fits into 6 0 times, leaving a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Include the next digit (6) from the dividend after 6, then repeat: 66 / 728

Moving on to step 2:
The number 728 fits into 66 0 times, leaving a remainder of 66.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 66 after subtracting 0 from 66.
Grab the next digit (2) from the dividend, add it to 66, then carry on: 662 / 728

Moving on to step 3:
The number 728 fits into 662 0 times, leaving a remainder of 662.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 662 and we're left with 662.
Append the next digit (8) from the dividend to 662 and continue with: 6628 / 728

Going ahead to step 4:
6628 divided by 728 is 9 with a remainder of 76.
Use 9 as the next digit of our solution. 
Result so far: 9.0
If we subtract 6552 from 6628, we get 76.
Take the next digit (6) from the dividend and append it to 76, then repeat: 766 / 728

Advancing to step 5:
If we divide 766 by 728, we get 1 and a remainder of 38.
Use 1 as the next digit of our solution. 
Result so far: 91.0
The remainder is 38 after subtracting 728 from 766.
Append the next digit (3) from the dividend to 38 and continue with: 383 / 728

Let's proceed to step 6:
If we divide 383 by 728, we get 0 and a remainder of 383.
The next digit of our result is 0. 
Result so far: 910.0
The remainder is 383 after subtracting 0 from 383.
Bring next digit (9) of the dividend behind the 383 and repeat the process: 3839 / 728

Moving on to step 7:
728 can be fit into 3839 5 times, resulting in a remainder of 199.
Put 5 as the next digit of the answer. 
Result so far: 9105.0
If we take 3640 away from 3839, we end up with 199.
Take the next digit (1) from the dividend and append it to 199, then repeat: 1991 / 728

Going ahead to step 8:
When dividing 1991 by 728, we get 2 with a remainder of 535.
The next digit of our result is 2. 
Result so far: 91052.0
Subtracting 1456 from 1991 leaves us with 535.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5350, and continue the process.

Let's proceed to step 9:
The number 728 fits into 5350 7 times, leaving a remainder of 254.
The number 7 becomes the next digit in our result. 
Result so far: 91052.7
If we subtract 5096 from 5350, we get 254.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2540, and continue the process.

Going ahead to step 10:
When dividing 2540 by 728, we get 3 with a remainder of 356.
Write down 3 as next digit of the result. 
Result so far: 91052.73
If we subtract 2184 from 2540, we get 356.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3560, and continue the process.

Let's proceed to step 11:
The number 728 fits into 3560 4 times, leaving a remainder of 648.
Record the quotient 4 as the next digit in the result. 
Result so far: 91052.734
Subtract 2912 from 3560 to get 648.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6480, and continue the process.

Going ahead to step 12:
When dividing 6480 by 728, we get 8 with a remainder of 656.
The number 8 becomes the next digit in our result. 
Result so far: 91052.7348
Deduct 5824 from 6480 and we're left with 656.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6560, and continue the process.

Step 13:
6560 divided by 728 is 9 with a remainder of 8.
The number 9 becomes the next digit in our result. 
Result so far: 91052.73489
The remainder is 8 after subtracting 6552 from 6560.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Advancing to step 14:
The number 728 fits into 80 0 times, leaving a remainder of 80.
Use 0 as the next digit of our solution. 
Result so far: 91052.73489
Subtract 0 from 80 to get 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Advancing to step 15:
The number 728 fits into 800 1 times, leaving a remainder of 72.
Write down 1 as next digit of the result. 
Result so far: 91052.7348901
Subtract 728 from 800 to get 72.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Let's proceed to step 16:
728 goes into 720 0 times with a remainder of 720.
Write down 0 as next digit of the result. 
Result so far: 91052.7348901
Subtract 0 from 720 to get 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 7200, and continue the process.

After the division, we end up with 91052.7348901 and a remainder of 7.2e-07.