We're dividing 66660872 by 721 
We want to figure out the number of times 66660872 can be divided by 721.

On to step 1:
6 divided by 721 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (6) from the dividend and append it to 6, then repeat: 66 / 721

Moving on to step 2:
721 can be fit into 66 0 times, resulting in a remainder of 66.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 66 to get 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 721

Step 3:
When dividing 666 by 721, we get 0 with a remainder of 666.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 666 and we're left with 666.
Fetch the next digit (6) from the dividend, attach it to 666 and continue: 6666 / 721

Let's proceed to step 4:
6666 divided by 721 is 9 with a remainder of 177.
The next digit of our result is 9. 
Result so far: 9.0
If we subtract 6489 from 6666, we get 177.
Bring next digit (0) of the dividend behind the 177 and repeat the process: 1770 / 721

Step 5:
If we divide 1770 by 721, we get 2 and a remainder of 328.
Write down 2 as next digit of the result. 
Result so far: 92.0
Deduct 1442 from 1770 and we're left with 328.
Append the next digit (8) from the dividend to 328 and continue with: 3288 / 721

Step 6:
The number 721 fits into 3288 4 times, leaving a remainder of 404.
The next digit of our result is 4. 
Result so far: 924.0
The remainder is 404 after subtracting 2884 from 3288.
Take the next digit (7) from the dividend and append it to 404, then repeat: 4047 / 721

Let's proceed to step 7:
721 can be fit into 4047 5 times, resulting in a remainder of 442.
Put 5 as the next digit of the answer. 
Result so far: 9245.0
If we subtract 3605 from 4047, we get 442.
Grab the next digit (2) from the dividend, add it to 442, then carry on: 4422 / 721

Let's proceed to step 8:
721 can be fit into 4422 6 times, resulting in a remainder of 96.
The number 6 becomes the next digit in our result. 
Result so far: 92456.0
If we subtract 4326 from 4422, we get 96.
Since there are no more digits in the dividend, we add a zero to the remainder making it 960, and continue the process.

Step 9:
721 can be fit into 960 1 times, resulting in a remainder of 239.
The next digit of our result is 1. 
Result so far: 92456.1
Deduct 721 from 960 and we're left with 239.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2390, and continue the process.

On to step 10:
2390 divided by 721 is 3 with a remainder of 227.
The number 3 becomes the next digit in our result. 
Result so far: 92456.13
Subtracting 2163 from 2390 leaves us with 227.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2270, and continue the process.

Advancing to step 11:
721 can be fit into 2270 3 times, resulting in a remainder of 107.
Write down 3 as next digit of the result. 
Result so far: 92456.133
If we take 2163 away from 2270, we end up with 107.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1070, and continue the process.

The final result is 92456.133 with a remainder of 0.0107.