We look at the division of 863170 by 15 
We want to figure out the number of times 863170 can be divided by 15.

Step 1:
If we divide 8 by 15, we get 0 and a remainder of 8.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Take the next digit (6) from the dividend and append it to 8, then repeat: 86 / 15

On to step 2:
86 divided by 15 is 5 with a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we take 75 away from 86, we end up with 11.
Take the next digit (3) from the dividend and append it to 11, then repeat: 113 / 15

Let's proceed to step 3:
When dividing 113 by 15, we get 7 with a remainder of 8.
Record the quotient 7 as the next digit in the result. 
Result so far: 57.0
The remainder is 8 after subtracting 105 from 113.
Append the next digit (1) from the dividend to 8 and continue with: 81 / 15

Moving on to step 4:
When dividing 81 by 15, we get 5 with a remainder of 6.
The next digit of our result is 5. 
Result so far: 575.0
If we subtract 75 from 81, we get 6.
Take the next digit (7) from the dividend and append it to 6, then repeat: 67 / 15

Advancing to step 5:
If we divide 67 by 15, we get 4 and a remainder of 7.
Put 4 as the next digit of the answer. 
Result so far: 5754.0
If we take 60 away from 67, we end up with 7.
Include the next digit (0) from the dividend after 7, then repeat: 70 / 15

Step 6:
15 can be fit into 70 4 times, resulting in a remainder of 10.
Put 4 as the next digit of the answer. 
Result so far: 57544.0
The remainder is 10 after subtracting 60 from 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 7:
When dividing 100 by 15, we get 6 with a remainder of 10.
The next digit of our result is 6. 
Result so far: 57544.6
Subtract 90 from 100 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 8:
When dividing 100 by 15, we get 6 with a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 57544.66
Deduct 90 from 100 and we're left with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 57544.66, with a leftover of 0.01.