We look at the division of 77801801 by 660 
We want to divide 77801801 by 660.

Step 1:
660 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 7, we get 7.
Include the next digit (7) from the dividend after 7, then repeat: 77 / 660

Advancing to step 2:
The number 660 fits into 77 0 times, leaving a remainder of 77.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 77, we get 77.
Include the next digit (8) from the dividend after 77, then repeat: 778 / 660

Advancing to step 3:
The number 660 fits into 778 1 times, leaving a remainder of 118.
Record the quotient 1 as the next digit in the result. 
Result so far: 1.0
If we subtract 660 from 778, we get 118.
Append the next digit (0) from the dividend to 118 and continue with: 1180 / 660

Let's proceed to step 4:
If we divide 1180 by 660, we get 1 and a remainder of 520.
The next digit of our result is 1. 
Result so far: 11.0
The remainder is 520 after subtracting 660 from 1180.
Bring next digit (1) of the dividend behind the 520 and repeat the process: 5201 / 660

On to step 5:
660 can be fit into 5201 7 times, resulting in a remainder of 581.
Record the quotient 7 as the next digit in the result. 
Result so far: 117.0
Subtract 4620 from 5201 to get 581.
Bring next digit (8) of the dividend behind the 581 and repeat the process: 5818 / 660

Advancing to step 6:
660 goes into 5818 8 times with a remainder of 538.
Write down 8 as next digit of the result. 
Result so far: 1178.0
The remainder is 538 after subtracting 5280 from 5818.
Include the next digit (0) from the dividend after 538, then repeat: 5380 / 660

Let's proceed to step 7:
5380 divided by 660 is 8 with a remainder of 100.
The next digit of our result is 8. 
Result so far: 11788.0
Deduct 5280 from 5380 and we're left with 100.
Grab the next digit (1) from the dividend, add it to 100, then carry on: 1001 / 660

Going ahead to step 8:
If we divide 1001 by 660, we get 1 and a remainder of 341.
Use 1 as the next digit of our solution. 
Result so far: 117881.0
Deduct 660 from 1001 and we're left with 341.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3410, and continue the process.

On to step 9:
If we divide 3410 by 660, we get 5 and a remainder of 110.
Write down 5 as next digit of the result. 
Result so far: 117881.5
Subtract 3300 from 3410 to get 110.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1100, and continue the process.

Let's proceed to step 10:
660 can be fit into 1100 1 times, resulting in a remainder of 440.
Record the quotient 1 as the next digit in the result. 
Result so far: 117881.51
The remainder is 440 after subtracting 660 from 1100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Moving on to step 11:
If we divide 4400 by 660, we get 6 and a remainder of 440.
The number 6 becomes the next digit in our result. 
Result so far: 117881.516
Subtracting 3960 from 4400 leaves us with 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

Advancing to step 12:
When dividing 4400 by 660, we get 6 with a remainder of 440.
The number 6 becomes the next digit in our result. 
Result so far: 117881.5166
Subtract 3960 from 4400 to get 440.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4400, and continue the process.

After the division, we end up with 117881.5166 and a remainder of 0.0044.