11815171 ÷ 660 
Our goal is to divide 11815171 by 660.

On to step 1:
If we divide 1 by 660, we get 0 and a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 1 after subtracting 0 from 1.
Take the next digit (1) from the dividend and append it to 1, then repeat: 11 / 660

Let's proceed to step 2:
11 divided by 660 is 0 with a remainder of 11.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 11 to get 11.
Grab the next digit (8) from the dividend, add it to 11, then carry on: 118 / 660

On to step 3:
660 can be fit into 118 0 times, resulting in a remainder of 118.
The next digit of our result is 0. 
Result so far: 0.0
Subtract 0 from 118 to get 118.
Include the next digit (1) from the dividend after 118, then repeat: 1181 / 660

Advancing to step 4:
When dividing 1181 by 660, we get 1 with a remainder of 521.
Use 1 as the next digit of our solution. 
Result so far: 1.0
If we subtract 660 from 1181, we get 521.
Grab the next digit (5) from the dividend, add it to 521, then carry on: 5215 / 660

Going ahead to step 5:
The number 660 fits into 5215 7 times, leaving a remainder of 595.
The next digit of our result is 7. 
Result so far: 17.0
Deduct 4620 from 5215 and we're left with 595.
Take the next digit (1) from the dividend and append it to 595, then repeat: 5951 / 660

Going ahead to step 6:
660 goes into 5951 9 times with a remainder of 11.
Use 9 as the next digit of our solution. 
Result so far: 179.0
Subtract 5940 from 5951 to get 11.
Bring next digit (7) of the dividend behind the 11 and repeat the process: 117 / 660

Let's proceed to step 7:
660 goes into 117 0 times with a remainder of 117.
The number 0 becomes the next digit in our result. 
Result so far: 1790.0
Subtracting 0 from 117 leaves us with 117.
Bring next digit (1) of the dividend behind the 117 and repeat the process: 1171 / 660

Advancing to step 8:
If we divide 1171 by 660, we get 1 and a remainder of 511.
Write down 1 as next digit of the result. 
Result so far: 17901.0
If we take 660 away from 1171, we end up with 511.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5110, and continue the process.

Moving on to step 9:
660 can be fit into 5110 7 times, resulting in a remainder of 490.
The next digit of our result is 7. 
Result so far: 17901.7
If we subtract 4620 from 5110, we get 490.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4900, and continue the process.

Advancing to step 10:
4900 divided by 660 is 7 with a remainder of 280.
Record the quotient 7 as the next digit in the result. 
Result so far: 17901.77
If we take 4620 away from 4900, we end up 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.

In conclusion, the division gives 17901.77 with a balance of 0.28.