866637 ÷ 6 
We're looking to find how many times 6 goes into 866637.

Moving on to step 1:
6 can be fit into 8 1 times, resulting in a remainder of 2.
Write down 1 as next digit of the result. 
Result so far: 1.0
The remainder is 2 after subtracting 6 from 8.
Fetch the next digit (6) from the dividend, attach it to 2 and continue: 26 / 6

Going ahead to step 2:
6 can be fit into 26 4 times, resulting in a remainder of 2.
The number 4 becomes the next digit in our result. 
Result so far: 14.0
Deduct 24 from 26 and we're left with 2.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 6

Going ahead to step 3:
If we divide 26 by 6, we get 4 and a remainder of 2.
Write down 4 as next digit of the result. 
Result so far: 144.0
The remainder is 2 after subtracting 24 from 26.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 6

Let's proceed to step 4:
26 divided by 6 is 4 with a remainder of 2.
Put 4 as the next digit of the answer. 
Result so far: 1444.0
Subtracting 24 from 26 leaves us with 2.
Append the next digit (3) from the dividend to 2 and continue with: 23 / 6

On to step 5:
6 goes into 23 3 times with a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 14443.0
Subtracting 18 from 23 leaves us with 5.
Append the next digit (7) from the dividend to 5 and continue with: 57 / 6

Step 6:
6 goes into 57 9 times with a remainder of 3.
Record the quotient 9 as the next digit in the result. 
Result so far: 144439.0
If we subtract 54 from 57, we 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.

Going ahead to step 7:
6 goes into 30 5 times with a remainder of 0.
The next digit of our result is 5. 
Result so far: 144439.5
If we subtract 30 from 30, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 8:
If we divide 0 by 6, we get 0 and a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 144439.5
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Step 9:
0 divided by 6 is 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 144439.5
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 144439.5, with a leftover of 0.0.