We look at the division of 405104 by 15 
Let's see how many times 15 fits into 405104.

Going ahead to step 1:
15 goes into 4 0 times with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 4 and we're left with 4.
Fetch the next digit (0) from the dividend, attach it to 4 and continue: 40 / 15

Step 2:
When dividing 40 by 15, we get 2 with a remainder of 10.
Record the quotient 2 as the next digit in the result. 
Result so far: 2.0
The remainder is 10 after subtracting 30 from 40.
Include the next digit (5) from the dividend after 10, then repeat: 105 / 15

Advancing to step 3:
15 can be fit into 105 7 times, resulting in a remainder of 0.
Record the quotient 7 as the next digit in the result. 
Result so far: 27.0
Subtract 105 from 105 to get 0.
Grab the next digit (1) from the dividend, add it to 0, then carry on: 1 / 15

Going ahead to step 4:
The number 15 fits into 1 0 times, leaving a remainder of 1.
The next digit of our result is 0. 
Result so far: 270.0
If we subtract 0 from 1, we get 1.
Fetch the next digit (0) from the dividend, attach it to 1 and continue: 10 / 15

Advancing to step 5:
10 divided by 15 is 0 with a remainder of 10.
The number 0 becomes the next digit in our result. 
Result so far: 2700.0
The remainder is 10 after subtracting 0 from 10.
Append the next digit (4) from the dividend to 10 and continue with: 104 / 15

Step 6:
15 goes into 104 6 times with a remainder of 14.
The next digit of our result is 6. 
Result so far: 27006.0
Subtract 90 from 104 to get 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Moving on to step 7:
When dividing 140 by 15, we get 9 with a remainder of 5.
The next digit of our result is 9. 
Result so far: 27006.9
If we take 135 away from 140, we end up with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Step 8:
The number 15 fits into 50 3 times, leaving a remainder of 5.
Put 3 as the next digit of the answer. 
Result so far: 27006.93
Subtracting 45 from 50 leaves us with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 9:
If we divide 50 by 15, we get 3 and a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 27006.933
Subtract 45 from 50 to get 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Our division results in 27006.933 with a remaining 0.0005.