We divide 408389 by 15
Let's see how many times 15 fits into 408389.

Going ahead to step 1:
4 divided by 15 is 0 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.
Append the next digit (0) from the dividend to 4 and continue with: 40 / 15

Advancing to step 2:
When dividing 40 by 15, we get 2 with a remainder of 10.
Put 2 as the next digit of the answer. 
Result so far: 2.0
Deduct 30 from 40 and we're left with 10.
Take the next digit (8) from the dividend and append it to 10, then repeat: 108 / 15

Step 3:
If we divide 108 by 15, we get 7 and a remainder of 3.
Write down 7 as next digit of the result. 
Result so far: 27.0
The remainder is 3 after subtracting 105 from 108.
Fetch the next digit (3) from the dividend, attach it to 3 and continue: 33 / 15

Going ahead to step 4:
15 goes into 33 2 times with a remainder of 3.
The number 2 becomes the next digit in our result. 
Result so far: 272.0
Subtract 30 from 33 to get 3.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 15

Moving on to step 5:
When dividing 38 by 15, we get 2 with a remainder of 8.
The next digit of our result is 2. 
Result so far: 2722.0
The remainder is 8 after subtracting 30 from 38.
Fetch the next digit (9) from the dividend, attach it to 8 and continue: 89 / 15

Moving on to step 6:
The number 15 fits into 89 5 times, leaving a remainder of 14.
Record the quotient 5 as the next digit in the result. 
Result so far: 27225.0
Subtracting 75 from 89 leaves us with 14.
Since there are no more digits in the dividend, we add a zero to the remainder making it 140, and continue the process.

Let's proceed to step 7:
15 can be fit into 140 9 times, resulting in a remainder of 5.
The number 9 becomes the next digit in our result. 
Result so far: 27225.9
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.

Going ahead to step 8:
15 can be fit into 50 3 times, resulting in a remainder of 5.
The next digit of our result is 3. 
Result so far: 27225.93
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 9:
15 goes into 50 3 times with a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 27225.933
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.

After the division, we end up with 27225.933 and a remainder of 0.0005.