15660866 ÷ 18 
Let's see how many times 18 fits into 15660866.

Advancing to step 1:
The number 18 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 0.0
If we subtract 0 from 1, we get 1.
Include the next digit (5) from the dividend after 1, then repeat: 15 / 18

Advancing to step 2:
When dividing 15 by 18, we get 0 with a remainder of 15.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 15 to get 15.
Take the next digit (6) from the dividend and append it to 15, then repeat: 156 / 18

Going ahead to step 3:
18 can be fit into 156 8 times, resulting in a remainder of 12.
Put 8 as the next digit of the answer. 
Result so far: 8.0
Subtracting 144 from 156 leaves us with 12.
Bring next digit (6) of the dividend behind the 12 and repeat the process: 126 / 18

Step 4:
The number 18 fits into 126 7 times, leaving a remainder of 0.
The next digit of our result is 7. 
Result so far: 87.0
The remainder is 0 after subtracting 126 from 126.
Append the next digit (0) from the dividend to 0 and continue with: 0 / 18

Moving on to step 5:
If we divide 0 by 18, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 870.0
Deduct 0 from 0 and we're left with 0.
Include the next digit (8) from the dividend after 0, then repeat: 8 / 18

Advancing to step 6:
When dividing 8 by 18, we get 0 with a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 8700.0
The remainder is 8 after subtracting 0 from 8.
Fetch the next digit (6) from the dividend, attach it to 8 and continue: 86 / 18

Advancing to step 7:
If we divide 86 by 18, we get 4 and a remainder of 14.
Use 4 as the next digit of our solution. 
Result so far: 87004.0
The remainder is 14 after subtracting 72 from 86.
Append the next digit (6) from the dividend to 14 and continue with: 146 / 18

Going ahead to step 8:
18 can be fit into 146 8 times, resulting in a remainder of 2.
Write down 8 as next digit of the result. 
Result so far: 870048.0
Subtracting 144 from 146 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Advancing to step 9:
18 can be fit into 20 1 times, resulting in a remainder of 2.
Record the quotient 1 as the next digit in the result. 
Result so far: 870048.1
Subtracting 18 from 20 leaves us with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

Let's proceed to step 10:
20 divided by 18 is 1 with a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 870048.11
The remainder is 2 after subtracting 18 from 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

The quotient of the division is 870048.11, and the remainder is 0.002.