We're dividing 305459 by 15 
We're looking to find how many times 15 goes into 305459.

Going ahead to step 1:
The number 15 fits into 3 0 times, leaving a remainder of 3.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 3 after subtracting 0 from 3.
Bring next digit (0) of the dividend behind the 3 and repeat the process: 30 / 15

On to step 2:
15 can be fit into 30 2 times, resulting in a remainder of 0.
Write down 2 as next digit of the result. 
Result so far: 2.0
Deduct 30 from 30 and we're left with 0.
Take the next digit (5) from the dividend and append it to 0, then repeat: 5 / 15

Going ahead to step 3:
When dividing 5 by 15, we get 0 with a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 20.0
The remainder is 5 after subtracting 0 from 5.
Take the next digit (4) from the dividend and append it to 5, then repeat: 54 / 15

Moving on to step 4:
15 goes into 54 3 times with a remainder of 9.
Put 3 as the next digit of the answer. 
Result so far: 203.0
If we subtract 45 from 54, we get 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 15

Let's proceed to step 5:
95 divided by 15 is 6 with a remainder of 5.
Put 6 as the next digit of the answer. 
Result so far: 2036.0
The remainder is 5 after subtracting 90 from 95.
Take the next digit (9) from the dividend and append it to 5, then repeat: 59 / 15

Moving on to step 6:
15 goes into 59 3 times with a remainder of 14.
Record the quotient 3 as the next digit in the result. 
Result so far: 20363.0
If we take 45 away from 59, we end up 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.

Moving on to step 7:
If we divide 140 by 15, we get 9 and a remainder of 5.
The next digit of our result is 9. 
Result so far: 20363.9
Subtracting 135 from 140 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 8:
When dividing 50 by 15, we get 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 20363.93
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.

On to step 9:
50 divided by 15 is 3 with a remainder of 5.
The next digit of our result is 3. 
Result so far: 20363.933
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.

The final result is 20363.933 with a remainder of 0.0005.