80310577 ÷ 660 
We want to figure out the number of times 80310577 can be divided by 660.

Going ahead to step 1:
660 can be fit into 8 0 times, resulting in a remainder of 8.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 8, we get 8.
Fetch the next digit (0) from the dividend, attach it to 8 and continue: 80 / 660

On to step 2:
The number 660 fits into 80 0 times, leaving a remainder of 80.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 80, we get 80.
Fetch the next digit (3) from the dividend, attach it to 80 and continue: 803 / 660

Going ahead to step 3:
660 goes into 803 1 times with a remainder of 143.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Deduct 660 from 803 and we're left with 143.
Append the next digit (1) from the dividend to 143 and continue with: 1431 / 660

Advancing to step 4:
If we divide 1431 by 660, we get 2 and a remainder of 111.
Put 2 as the next digit of the answer. 
Result so far: 12.0
If we take 1320 away from 1431, we end up with 111.
Include the next digit (0) from the dividend after 111, then repeat: 1110 / 660

Moving on to step 5:
1110 divided by 660 is 1 with a remainder of 450.
Record the quotient 1 as the next digit in the result. 
Result so far: 121.0
Subtracting 660 from 1110 leaves us with 450.
Fetch the next digit (5) from the dividend, attach it to 450 and continue: 4505 / 660

Moving on to step 6:
660 can be fit into 4505 6 times, resulting in a remainder of 545.
Record the quotient 6 as the next digit in the result. 
Result so far: 1216.0
If we subtract 3960 from 4505, we get 545.
Take the next digit (7) from the dividend and append it to 545, then repeat: 5457 / 660

Moving on to step 7:
When dividing 5457 by 660, we get 8 with a remainder of 177.
The next digit of our result is 8. 
Result so far: 12168.0
The remainder is 177 after subtracting 5280 from 5457.
Bring next digit (7) of the dividend behind the 177 and repeat the process: 1777 / 660

Going ahead to step 8:
1777 divided by 660 is 2 with a remainder of 457.
Use 2 as the next digit of our solution. 
Result so far: 121682.0
The remainder is 457 after subtracting 1320 from 1777.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4570, and continue the process.

On to step 9:
The number 660 fits into 4570 6 times, leaving a remainder of 610.
Use 6 as the next digit of our solution. 
Result so far: 121682.6
Subtracting 3960 from 4570 leaves us with 610.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6100, and continue the process.

Step 10:
660 can be fit into 6100 9 times, resulting in a remainder of 160.
Use 9 as the next digit of our solution. 
Result so far: 121682.69
Subtract 5940 from 6100 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 11:
When dividing 1600 by 660, we get 2 with a remainder of 280.
Record the quotient 2 as the next digit in the result. 
Result so far: 121682.692
If we subtract 1320 from 1600, we get 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 12:
When dividing 2800 by 660, we get 4 with a remainder of 160.
The next digit of our result is 4. 
Result so far: 121682.6924
Subtract 2640 from 2800 to get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

On to step 13:
If we divide 1600 by 660, we get 2 and a remainder of 280.
Write down 2 as next digit of the result. 
Result so far: 121682.69242
Subtracting 1320 from 1600 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Moving on to step 14:
660 can be fit into 2800 4 times, resulting in a remainder of 160.
The number 4 becomes the next digit in our result. 
Result so far: 121682.692424
If we subtract 2640 from 2800, we get 160.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

Step 15:
660 can be fit into 1600 2 times, resulting in a remainder of 280.
Put 2 as the next digit of the answer. 
Result so far: 121682.6924242
Subtracting 1320 from 1600 leaves us with 280.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2800, and continue the process.

Going ahead to step 16:
660 goes into 2800 4 times with a remainder of 160.
Record the quotient 4 as the next digit in the result. 
Result so far: 121682.69242424
The remainder is 160 after subtracting 2640 from 2800.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1600, and continue the process.

The final result is 121682.69242424 with a remainder of 1.6e-07.