We look at the division of 87309 by 86 
Let's see how many times 86 fits into 87309.

Moving on to step 1:
8 divided by 86 is 0 with a remainder of 8.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 8 after subtracting 0 from 8.
Bring next digit (7) of the dividend behind the 8 and repeat the process: 87 / 86

Step 2:
When dividing 87 by 86, we get 1 with a remainder of 1.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 86 from 87 and we're left with 1.
Fetch the next digit (3) from the dividend, attach it to 1 and continue: 13 / 86

Moving on to step 3:
When dividing 13 by 86, we get 0 with a remainder of 13.
The number 0 becomes the next digit in our result. 
Result so far: 10.0
Subtracting 0 from 13 leaves us with 13.
Append the next digit (0) from the dividend to 13 and continue with: 130 / 86

Advancing to step 4:
86 can be fit into 130 1 times, resulting in a remainder of 44.
Write down 1 as next digit of the result. 
Result so far: 101.0
The remainder is 44 after subtracting 86 from 130.
Append the next digit (9) from the dividend to 44 and continue with: 449 / 86

Moving on to step 5:
If we divide 449 by 86, we get 5 and a remainder of 19.
Record the quotient 5 as the next digit in the result. 
Result so far: 1015.0
Subtract 430 from 449 to get 19.
Since there are no more digits in the dividend, we add a zero to the remainder making it 190, and continue the process.

Let's proceed to step 6:
86 can be fit into 190 2 times, resulting in a remainder of 18.
The number 2 becomes the next digit in our result. 
Result so far: 1015.2
Deduct 172 from 190 and we're left with 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

On to step 7:
The number 86 fits into 180 2 times, leaving a remainder of 8.
Put 2 as the next digit of the answer. 
Result so far: 1015.22
If we take 172 away from 180, we end up with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

After the division, we end up with 1015.22 and a remainder of 0.008.