We look at the division of 86909349 by 15 
Let's see how many times 15 fits into 86909349.

On to step 1:
The number 15 fits into 8 0 times, leaving a remainder of 8.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 8 and we're left with 8.
Append the next digit (6) from the dividend to 8 and continue with: 86 / 15

Step 2:
If we divide 86 by 15, we get 5 and a remainder of 11.
The next digit of our result is 5. 
Result so far: 5.0
Subtracting 75 from 86 leaves us with 11.
Fetch the next digit (9) from the dividend, attach it to 11 and continue: 119 / 15

Step 3:
When dividing 119 by 15, we get 7 with a remainder of 14.
The next digit of our result is 7. 
Result so far: 57.0
If we take 105 away from 119, we end up with 14.
Fetch the next digit (0) from the dividend, attach it to 14 and continue: 140 / 15

Step 4:
The number 15 fits into 140 9 times, leaving a remainder of 5.
Use 9 as the next digit of our solution. 
Result so far: 579.0
Subtracting 135 from 140 leaves us with 5.
Append the next digit (9) from the dividend to 5 and continue with: 59 / 15

Advancing to step 5:
If we divide 59 by 15, we get 3 and a remainder of 14.
Write down 3 as next digit of the result. 
Result so far: 5793.0
The remainder is 14 after subtracting 45 from 59.
Take the next digit (3) from the dividend and append it to 14, then repeat: 143 / 15

Moving on to step 6:
15 can be fit into 143 9 times, resulting in a remainder of 8.
The number 9 becomes the next digit in our result. 
Result so far: 57939.0
The remainder is 8 after subtracting 135 from 143.
Bring next digit (4) of the dividend behind the 8 and repeat the process: 84 / 15

Step 7:
If we divide 84 by 15, we get 5 and a remainder of 9.
Write down 5 as next digit of the result. 
Result so far: 579395.0
Deduct 75 from 84 and we're left with 9.
Fetch the next digit (9) from the dividend, attach it to 9 and continue: 99 / 15

Going ahead to step 8:
99 divided by 15 is 6 with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 5793956.0
If we subtract 90 from 99, we get 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 9:
15 goes into 90 6 times with a remainder of 0.
Put 6 as the next digit of the answer. 
Result so far: 5793956.6
If we take 90 away from 90, we end up 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 10:
15 goes into 0 0 times with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 5793956.6
Subtract 0 from 0 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 11:
15 can be fit into 0 0 times, resulting in a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 5793956.6
If we take 0 away from 0, we end up 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 quotient of the division is 5793956.6, and the remainder is 0.0.