863664 ÷ 3 
Our goal is to divide 863664 by 3.

Going ahead to step 1:
If we divide 8 by 3, we get 2 and a remainder of 2.
The next digit of our result is 2. 
Result so far: 2.0
Deduct 6 from 8 and we're left with 2.
Include the next digit (6) from the dividend after 2, then repeat: 26 / 3

Going ahead to step 2:
26 divided by 3 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 28.0
Deduct 24 from 26 and we're left with 2.
Grab the next digit (3) from the dividend, add it to 2, then carry on: 23 / 3

Let's proceed to step 3:
If we divide 23 by 3, we get 7 and a remainder of 2.
Put 7 as the next digit of the answer. 
Result so far: 287.0
Deduct 21 from 23 and we're left with 2.
Bring next digit (6) of the dividend behind the 2 and repeat the process: 26 / 3

On to step 4:
The number 3 fits into 26 8 times, leaving a remainder of 2.
The number 8 becomes the next digit in our result. 
Result so far: 2878.0
The remainder is 2 after subtracting 24 from 26.
Grab the next digit (6) from the dividend, add it to 2, then carry on: 26 / 3

Let's proceed to step 5:
26 divided by 3 is 8 with a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 28788.0
Deduct 24 from 26 and we're left with 2.
Take the next digit (4) from the dividend and append it to 2, then repeat: 24 / 3

On to step 6:
When dividing 24 by 3, we get 8 with a remainder of 0.
The next digit of our result is 8. 
Result so far: 287888.0
If we subtract 24 from 24, 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.

Moving on to step 7:
3 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 287888.0
Subtract 0 from 0 to 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.

Advancing to step 8:
The number 3 fits into 0 0 times, leaving a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 287888.0
Deduct 0 from 0 and we're left with 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 287888.0, with a leftover of 0.0.