We look at the division of 286408 by 3 
We want to figure out the number of times 286408 can be divided by 3.

Step 1:
If we divide 2 by 3, we get 0 and a remainder of 2.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 2 and we're left with 2.
Append the next digit (8) from the dividend to 2 and continue with: 28 / 3

On to step 2:
When dividing 28 by 3, we get 9 with a remainder of 1.
The number 9 becomes the next digit in our result. 
Result so far: 9.0
If we subtract 27 from 28, we get 1.
Take the next digit (6) from the dividend and append it to 1, then repeat: 16 / 3

On to step 3:
If we divide 16 by 3, we get 5 and a remainder of 1.
Record the quotient 5 as the next digit in the result. 
Result so far: 95.0
Subtract 15 from 16 to get 1.
Grab the next digit (4) from the dividend, add it to 1, then carry on: 14 / 3

Advancing to step 4:
If we divide 14 by 3, we get 4 and a remainder of 2.
Record the quotient 4 as the next digit in the result. 
Result so far: 954.0
If we take 12 away from 14, we end up with 2.
Include the next digit (0) from the dividend after 2, then repeat: 20 / 3

On to step 5:
If we divide 20 by 3, we get 6 and a remainder of 2.
Write down 6 as next digit of the result. 
Result so far: 9546.0
If we subtract 18 from 20, we get 2.
Fetch the next digit (8) from the dividend, attach it to 2 and continue: 28 / 3

Going ahead to step 6:
3 goes into 28 9 times with a remainder of 1.
Write down 9 as next digit of the result. 
Result so far: 95469.0
Subtracting 27 from 28 leaves us 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.

Going ahead to step 7:
When dividing 10 by 3, we get 3 with a remainder of 1.
Put 3 as the next digit of the answer. 
Result so far: 95469.3
If we subtract 9 from 10, we 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.

On to step 8:
The number 3 fits into 10 3 times, leaving a remainder of 1.
Use 3 as the next digit of our solution. 
Result so far: 95469.33
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.

The quotient of the division is 95469.33, and the remainder is 0.001.