We look at the division of 810286 by 3 
Let's see how many times 3 fits into 810286.

Let's proceed to step 1:
If we divide 8 by 3, we get 2 and a remainder of 2.
Use 2 as the next digit of our solution. 
Result so far: 2.0
The remainder is 2 after subtracting 6 from 8.
Take the next digit (1) from the dividend and append it to 2, then repeat: 21 / 3

Going ahead to step 2:
If we divide 21 by 3, we get 7 and a remainder of 0.
The next digit of our result is 7. 
Result so far: 27.0
Subtracting 21 from 21 leaves us with 0.
Fetch the next digit (0) from the dividend, attach it to 0 and continue: 0 / 3

On to step 3:
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: 270.0
If we subtract 0 from 0, we get 0.
Append the next digit (2) from the dividend to 0 and continue with: 2 / 3

Going ahead to step 4:
When dividing 2 by 3, we get 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 2700.0
The remainder is 2 after subtracting 0 from 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

Moving on to step 5:
If we divide 28 by 3, we get 9 and a remainder of 1.
Record the quotient 9 as the next digit in the result. 
Result so far: 27009.0
Subtract 27 from 28 to get 1.
Include the next digit (6) from the dividend after 1, then repeat: 16 / 3

Advancing to step 6:
3 goes into 16 5 times with a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 270095.0
The remainder is 1 after subtracting 15 from 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 7:
3 can be fit into 10 3 times, resulting in a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 270095.3
If we take 9 away from 10, we end up with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Moving on to step 8:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 270095.33
Subtract 9 from 10 to get 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

The final outcome is 270095.33, with a leftover of 0.001.