66815655 ÷ 728 
We're looking to find how many times 728 goes into 66815655.

Let's proceed to step 1:
The number 728 fits into 6 0 times, leaving a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (6) of the dividend behind the 6 and repeat the process: 66 / 728

On to step 2:
66 divided by 728 is 0 with a remainder of 66.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Grab the next digit (8) from the dividend, add it to 66, then carry on: 668 / 728

Let's proceed to step 3:
728 goes into 668 0 times with a remainder of 668.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 668 leaves us with 668.
Fetch the next digit (1) from the dividend, attach it to 668 and continue: 6681 / 728

Moving on to step 4:
If we divide 6681 by 728, we get 9 and a remainder of 129.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
Subtract 6552 from 6681 to get 129.
Include the next digit (5) from the dividend after 129, then repeat: 1295 / 728

Step 5:
728 goes into 1295 1 times with a remainder of 567.
The next digit of our result is 1. 
Result so far: 91.0
Subtracting 728 from 1295 leaves us with 567.
Include the next digit (6) from the dividend after 567, then repeat: 5676 / 728

Going ahead to step 6:
When dividing 5676 by 728, we get 7 with a remainder of 580.
Write down 7 as next digit of the result. 
Result so far: 917.0
Subtract 5096 from 5676 to get 580.
Append the next digit (5) from the dividend to 580 and continue with: 5805 / 728

Moving on to step 7:
5805 divided by 728 is 7 with a remainder of 709.
Use 7 as the next digit of our solution. 
Result so far: 9177.0
Deduct 5096 from 5805 and we're left with 709.
Grab the next digit (5) from the dividend, add it to 709, then carry on: 7095 / 728

Moving on to step 8:
728 can be fit into 7095 9 times, resulting in a remainder of 543.
Put 9 as the next digit of the answer. 
Result so far: 91779.0
If we subtract 6552 from 7095, we get 543.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5430, and continue the process.

Step 9:
728 goes into 5430 7 times with a remainder of 334.
The next digit of our result is 7. 
Result so far: 91779.7
If we subtract 5096 from 5430, we get 334.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3340, and continue the process.

On to step 10:
728 can be fit into 3340 4 times, resulting in a remainder of 428.
Write down 4 as next digit of the result. 
Result so far: 91779.74
If we subtract 2912 from 3340, we get 428.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4280, and continue the process.

Let's proceed to step 11:
When dividing 4280 by 728, we get 5 with a remainder of 640.
Write down 5 as next digit of the result. 
Result so far: 91779.745
The remainder is 640 after subtracting 3640 from 4280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6400, and continue the process.

Step 12:
728 goes into 6400 8 times with a remainder of 576.
The next digit of our result is 8. 
Result so far: 91779.7458
If we take 5824 away from 6400, we end up with 576.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5760, and continue the process.

Advancing to step 13:
5760 divided by 728 is 7 with a remainder of 664.
Put 7 as the next digit of the answer. 
Result so far: 91779.74587
If we take 5096 away from 5760, we end up with 664.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6640, and continue the process.

Advancing to step 14:
728 goes into 6640 9 times with a remainder of 88.
Use 9 as the next digit of our solution. 
Result so far: 91779.745879
Deduct 6552 from 6640 and we're left with 88.
Since there are no more digits in the dividend, we add a zero to the remainder making it 880, and continue the process.

Let's proceed to step 15:
728 goes into 880 1 times with a remainder of 152.
Use 1 as the next digit of our solution. 
Result so far: 91779.7458791
If we take 728 away from 880, we end up with 152.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1520, and continue the process.

Going ahead to step 16:
728 can be fit into 1520 2 times, resulting in a remainder of 64.
Use 2 as the next digit of our solution. 
Result so far: 91779.74587912
If we take 1456 away from 1520, we end up with 64.
Since there are no more digits in the dividend, we add a zero to the remainder making it 640, and continue the process.

The final outcome is 91779.74587912, with a leftover of 6.4e-08.