Let's divide 866409 by 3
Let's see how many times 3 fits into 866409.

On to step 1:
If we divide 8 by 3, we get 2 and a remainder of 2.
The number 2 becomes the next digit in our result. 
Result so far: 2.0
If we subtract 6 from 8, we get 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 3

Advancing to step 2:
The number 3 fits into 26 8 times, leaving a remainder of 2.
Use 8 as the next digit of our solution. 
Result so far: 28.0
If we subtract 24 from 26, we get 2.
Append the next digit (6) from the dividend to 2 and continue with: 26 / 3

Let's proceed to step 3:
If we divide 26 by 3, we get 8 and a remainder of 2.
The next digit of our result is 8. 
Result so far: 288.0
Subtract 24 from 26 to get 2.
Grab the next digit (4) from the dividend, add it to 2, then carry on: 24 / 3

Let's proceed to step 4:
3 goes into 24 8 times with a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 2888.0
Subtract 24 from 24 to get 0.
Grab the next digit (0) from the dividend, add it to 0, then carry on: 0 / 3

Step 5:
The number 3 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 28880.0
Subtract 0 from 0 to get 0.
Include the next digit (9) from the dividend after 0, then repeat: 9 / 3

Going ahead to step 6:
3 can be fit into 9 3 times, resulting in a remainder of 0.
Record the quotient 3 as the next digit in the result. 
Result so far: 288803.0
The remainder is 0 after subtracting 9 from 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 7:
If we divide 0 by 3, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 288803.0
If we take 0 away from 0, we end up 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.

Step 8:
When dividing 0 by 3, we get 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 288803.0
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

In conclusion, the division gives 288803.0 with a balance of 0.0.