256887 divided by 15 
We want to figure out the number of times 256887 can be divided by 15.

Step 1:
2 divided by 15 is 0 with a remainder of 2.
Use 0 as the next digit of our solution. 
Result so far: 0.0
If we subtract 0 from 2, we get 2.
Append the next digit (5) from the dividend to 2 and continue with: 25 / 15

Step 2:
When dividing 25 by 15, we get 1 with a remainder of 10.
Write down 1 as next digit of the result. 
Result so far: 1.0
Subtracting 15 from 25 leaves us with 10.
Include the next digit (6) from the dividend after 10, then repeat: 106 / 15

Advancing to step 3:
15 goes into 106 7 times with a remainder of 1.
The number 7 becomes the next digit in our result. 
Result so far: 17.0
The remainder is 1 after subtracting 105 from 106.
Take the next digit (8) from the dividend and append it to 1, then repeat: 18 / 15

Advancing to step 4:
18 divided by 15 is 1 with a remainder of 3.
Use 1 as the next digit of our solution. 
Result so far: 171.0
The remainder is 3 after subtracting 15 from 18.
Take the next digit (8) from the dividend and append it to 3, then repeat: 38 / 15

On to step 5:
38 divided by 15 is 2 with a remainder of 8.
Use 2 as the next digit of our solution. 
Result so far: 1712.0
The remainder is 8 after subtracting 30 from 38.
Fetch the next digit (7) from the dividend, attach it to 8 and continue: 87 / 15

Going ahead to step 6:
If we divide 87 by 15, we get 5 and a remainder of 12.
Write down 5 as next digit of the result. 
Result so far: 17125.0
Subtract 75 from 87 to get 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 7:
The number 15 fits into 120 8 times, leaving a remainder of 0.
Write down 8 as next digit of the result. 
Result so far: 17125.8
Subtract 120 from 120 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.

On to step 8:
0 divided by 15 is 0 with a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 17125.8
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:
15 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 17125.8
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.

The final outcome is 17125.8, with a leftover of 0.0.