861535 ÷ 15 
We want to figure out the number of times 861535 can be divided by 15.

On to step 1:
15 can be fit into 8 0 times, resulting in a remainder of 8.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 8 leaves us with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 15

Going ahead to step 2:
15 can be fit into 86 5 times, resulting in a remainder of 11.
Put 5 as the next digit of the answer. 
Result so far: 5.0
If we subtract 75 from 86, we get 11.
Grab the next digit (1) from the dividend, add it to 11, then carry on: 111 / 15

Let's proceed to step 3:
111 divided by 15 is 7 with a remainder of 6.
The number 7 becomes the next digit in our result. 
Result so far: 57.0
Subtract 105 from 111 to get 6.
Grab the next digit (5) from the dividend, add it to 6, then carry on: 65 / 15

Let's proceed to step 4:
15 can be fit into 65 4 times, resulting in a remainder of 5.
Write down 4 as next digit of the result. 
Result so far: 574.0
Subtracting 60 from 65 leaves us with 5.
Fetch the next digit (3) from the dividend, attach it to 5 and continue: 53 / 15

Advancing to step 5:
15 goes into 53 3 times with a remainder of 8.
The number 3 becomes the next digit in our result. 
Result so far: 5743.0
If we take 45 away from 53, we end up with 8.
Take the next digit (5) from the dividend and append it to 8, then repeat: 85 / 15

Advancing to step 6:
The number 15 fits into 85 5 times, leaving a remainder of 10.
Record the quotient 5 as the next digit in the result. 
Result so far: 57435.0
Subtract 75 from 85 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.

On to step 7:
15 can be fit into 100 6 times, resulting in a remainder of 10.
Record the quotient 6 as the next digit in the result. 
Result so far: 57435.6
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 8:
15 goes into 100 6 times with a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 57435.66
If we subtract 90 from 100, we 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.

The final outcome is 57435.66, with a leftover of 0.01.