859239 divided by 15 
We want to divide 859239 by 15.

Let's proceed to step 1:
15 can be fit into 8 0 times, resulting in a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Include the next digit (5) from the dividend after 8, then repeat: 85 / 15

Let's proceed to step 2:
When dividing 85 by 15, we get 5 with a remainder of 10.
Use 5 as the next digit of our solution. 
Result so far: 5.0
The remainder is 10 after subtracting 75 from 85.
Include the next digit (9) from the dividend after 10, then repeat: 109 / 15

Step 3:
When dividing 109 by 15, we get 7 with a remainder of 4.
Write down 7 as next digit of the result. 
Result so far: 57.0
The remainder is 4 after subtracting 105 from 109.
Take the next digit (2) from the dividend and append it to 4, then repeat: 42 / 15

Moving on to step 4:
If we divide 42 by 15, we get 2 and a remainder of 12.
Put 2 as the next digit of the answer. 
Result so far: 572.0
If we subtract 30 from 42, we get 12.
Include the next digit (3) from the dividend after 12, then repeat: 123 / 15

Advancing to step 5:
15 can be fit into 123 8 times, resulting in a remainder of 3.
Record the quotient 8 as the next digit in the result. 
Result so far: 5728.0
Deduct 120 from 123 and we're left with 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 15

Step 6:
39 divided by 15 is 2 with a remainder of 9.
Put 2 as the next digit of the answer. 
Result so far: 57282.0
Subtracting 30 from 39 leaves us with 9.
Since there are no more digits in the dividend, we add a zero to the remainder making it 90, and continue the process.

Step 7:
90 divided by 15 is 6 with a remainder of 0.
The next digit of our result is 6. 
Result so far: 57282.6
Subtract 90 from 90 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
15 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 57282.6
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.

On to step 9:
15 goes into 0 0 times with a remainder of 0.
The next digit of our result is 0. 
Result so far: 57282.6
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.

The final outcome is 57282.6, with a leftover of 0.0.