66891 divided by 18 
We want to divide 66891 by 18.

Moving on to step 1:
The number 18 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 18

Advancing to step 2:
The number 18 fits into 66 3 times, leaving a remainder of 12.
The next digit of our result is 3. 
Result so far: 3.0
Subtract 54 from 66 to get 12.
Take the next digit (8) from the dividend and append it to 12, then repeat: 128 / 18

Moving on to step 3:
If we divide 128 by 18, we get 7 and a remainder of 2.
Record the quotient 7 as the next digit in the result. 
Result so far: 37.0
If we subtract 126 from 128, we get 2.
Fetch the next digit (9) from the dividend, attach it to 2 and continue: 29 / 18

Step 4:
When dividing 29 by 18, we get 1 with a remainder of 11.
The number 1 becomes the next digit in our result. 
Result so far: 371.0
The remainder is 11 after subtracting 18 from 29.
Include the next digit (1) from the dividend after 11, then repeat: 111 / 18

Advancing to step 5:
18 can be fit into 111 6 times, resulting in a remainder of 3.
Record the quotient 6 as the next digit in the result. 
Result so far: 3716.0
Subtract 108 from 111 to get 3.
Since there are no more digits in the dividend, we add a zero to the remainder making it 30, and continue the process.

Let's proceed to step 6:
If we divide 30 by 18, we get 1 and a remainder of 12.
Record the quotient 1 as the next digit in the result. 
Result so far: 3716.1
If we subtract 18 from 30, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Step 7:
18 can be fit into 120 6 times, resulting in a remainder of 12.
Put 6 as the next digit of the answer. 
Result so far: 3716.16
Subtract 108 from 120 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Going ahead to step 8:
120 divided by 18 is 6 with a remainder of 12.
The number 6 becomes the next digit in our result. 
Result so far: 3716.166
If we subtract 108 from 120, we get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Our division results in 3716.166 with a remaining 0.0012.