585399 ÷ 15 
We want to divide 585399 by 15.

Advancing to step 1:
The number 15 fits into 5 0 times, leaving a remainder of 5.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Take the next digit (8) from the dividend and append it to 5, then repeat: 58 / 15

Step 2:
If we divide 58 by 15, we get 3 and a remainder of 13.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
If we take 45 away from 58, we end up with 13.
Append the next digit (5) from the dividend to 13 and continue with: 135 / 15

Let's proceed to step 3:
135 divided by 15 is 9 with a remainder of 0.
Put 9 as the next digit of the answer. 
Result so far: 39.0
If we subtract 135 from 135, we get 0.
Include the next digit (3) from the dividend after 0, then repeat: 3 / 15

On to step 4:
15 goes into 3 0 times with a remainder of 3.
Use 0 as the next digit of our solution. 
Result so far: 390.0
Deduct 0 from 3 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 15

Going ahead to step 5:
When dividing 39 by 15, we get 2 with a remainder of 9.
Record the quotient 2 as the next digit in the result. 
Result so far: 3902.0
Subtracting 30 from 39 leaves us with 9.
Bring next digit (9) of the dividend behind the 9 and repeat the process: 99 / 15

Let's proceed to step 6:
When dividing 99 by 15, we get 6 with a remainder of 9.
Write down 6 as next digit of the result. 
Result so far: 39026.0
The remainder is 9 after subtracting 90 from 99.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Moving on to step 7:
15 goes into 90 6 times with a remainder of 0.
Use 6 as the next digit of our solution. 
Result so far: 39026.6
Deduct 90 from 90 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
15 goes into 0 0 times with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 39026.6
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 9:
The number 15 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 39026.6
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Our division results in 39026.6 with a remaining 0.0.