80243072 ÷ 660 
Our goal is to divide 80243072 by 660.

Step 1:
660 goes into 8 0 times with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Grab the next digit (0) from the dividend, add it to 8, then carry on: 80 / 660

Moving on to step 2:
660 goes into 80 0 times with a remainder of 80.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 80 to get 80.
Grab the next digit (2) from the dividend, add it to 80, then carry on: 802 / 660

Step 3:
When dividing 802 by 660, we get 1 with a remainder of 142.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we take 660 away from 802, we end up with 142.
Append the next digit (4) from the dividend to 142 and continue with: 1424 / 660

Moving on to step 4:
660 can be fit into 1424 2 times, resulting in a remainder of 104.
Write down 2 as next digit of the result. 
Result so far: 12.0
Subtract 1320 from 1424 to get 104.
Bring next digit (3) of the dividend behind the 104 and repeat the process: 1043 / 660

On to step 5:
660 can be fit into 1043 1 times, resulting in a remainder of 383.
The number 1 becomes the next digit in our result. 
Result so far: 121.0
If we subtract 660 from 1043, we get 383.
Grab the next digit (0) from the dividend, add it to 383, then carry on: 3830 / 660

Advancing to step 6:
3830 divided by 660 is 5 with a remainder of 530.
Use 5 as the next digit of our solution. 
Result so far: 1215.0
The remainder is 530 after subtracting 3300 from 3830.
Append the next digit (7) from the dividend to 530 and continue with: 5307 / 660

Going ahead to step 7:
5307 divided by 660 is 8 with a remainder of 27.
The number 8 becomes the next digit in our result. 
Result so far: 12158.0
If we take 5280 away from 5307, we end up with 27.
Take the next digit (2) from the dividend and append it to 27, then repeat: 272 / 660

Advancing to step 8:
The number 660 fits into 272 0 times, leaving a remainder of 272.
Record the quotient 0 as the next digit in the result. 
Result so far: 121580.0
Subtracting 0 from 272 leaves us with 272.
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 9:
660 can be fit into 2720 4 times, resulting in a remainder of 80.
The number 4 becomes the next digit in our result. 
Result so far: 121580.4
If we subtract 2640 from 2720, we 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.

On to step 10:
When dividing 800 by 660, we get 1 with a remainder of 140.
Write down 1 as next digit of the result. 
Result so far: 121580.41
If we subtract 660 from 800, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 11:
660 can be fit into 1400 2 times, resulting in a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 121580.412
The remainder is 80 after subtracting 1320 from 1400.
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 12:
660 can be fit into 800 1 times, resulting in a remainder of 140.
The next digit of our result is 1. 
Result so far: 121580.4121
If we subtract 660 from 800, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 13:
When dividing 1400 by 660, we get 2 with a remainder of 80.
Record the quotient 2 as the next digit in the result. 
Result so far: 121580.41212
Subtracting 1320 from 1400 leaves us with 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 14:
660 goes into 800 1 times with a remainder of 140.
Use 1 as the next digit of our solution. 
Result so far: 121580.412121
Subtracting 660 from 800 leaves us with 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

Moving on to step 15:
The number 660 fits into 1400 2 times, leaving a remainder of 80.
The number 2 becomes the next digit in our result. 
Result so far: 121580.4121212
Deduct 1320 from 1400 and we're left with 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 800, and continue the process.

Going ahead to step 16:
When dividing 800 by 660, we get 1 with a remainder of 140.
Write down 1 as next digit of the result. 
Result so far: 121580.41212121
If we subtract 660 from 800, we get 140.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1400, and continue the process.

The quotient of the division is 121580.41212121, and the remainder is 1.4e-07.