666585 ÷ 81 
Let's see how many times 81 fits into 666585.

Advancing to step 1:
81 can be fit into 6 0 times, resulting in a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Append the next digit (6) from the dividend to 6 and continue with: 66 / 81

On to step 2:
If we divide 66 by 81, we get 0 and a remainder of 66.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtracting 0 from 66 leaves us with 66.
Take the next digit (6) from the dividend and append it to 66, then repeat: 666 / 81

Let's proceed to step 3:
81 goes into 666 8 times with a remainder of 18.
Write down 8 as next digit of the result. 
Result so far: 8.0
If we subtract 648 from 666, we get 18.
Take the next digit (5) from the dividend and append it to 18, then repeat: 185 / 81

Step 4:
81 can be fit into 185 2 times, resulting in a remainder of 23.
The next digit of our result is 2. 
Result so far: 82.0
Deduct 162 from 185 and we're left with 23.
Take the next digit (8) from the dividend and append it to 23, then repeat: 238 / 81

On to step 5:
When dividing 238 by 81, we get 2 with a remainder of 76.
The next digit of our result is 2. 
Result so far: 822.0
If we take 162 away from 238, we end up with 76.
Grab the next digit (5) from the dividend, add it to 76, then carry on: 765 / 81

On to step 6:
The number 81 fits into 765 9 times, leaving a remainder of 36.
Use 9 as the next digit of our solution. 
Result so far: 8229.0
If we subtract 729 from 765, we get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 7:
360 divided by 81 is 4 with a remainder of 36.
The number 4 becomes the next digit in our result. 
Result so far: 8229.4
If we take 324 away from 360, we end up with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Let's proceed to step 8:
81 goes into 360 4 times with a remainder of 36.
Write down 4 as next digit of the result. 
Result so far: 8229.44
Subtracting 324 from 360 leaves us with 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Our division results in 8229.44 with a remaining 0.036.