15815 ÷ 85 
We're looking to find how many times 85 goes into 15815.

Moving on to step 1:
The number 85 fits into 1 0 times, leaving a remainder of 1.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 1, we end up with 1.
Take the next digit (5) from the dividend and append it to 1, then repeat: 15 / 85

On to step 2:
85 goes into 15 0 times with a remainder of 15.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 15 after subtracting 0 from 15.
Grab the next digit (8) from the dividend, add it to 15, then carry on: 158 / 85

Going ahead to step 3:
When dividing 158 by 85, we get 1 with a remainder of 73.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Deduct 85 from 158 and we're left with 73.
Bring next digit (1) of the dividend behind the 73 and repeat the process: 731 / 85

Going ahead to step 4:
When dividing 731 by 85, we get 8 with a remainder of 51.
Use 8 as the next digit of our solution. 
Result so far: 18.0
The remainder is 51 after subtracting 680 from 731.
Grab the next digit (5) from the dividend, add it to 51, then carry on: 515 / 85

On to step 5:
The number 85 fits into 515 6 times, leaving a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 186.0
Deduct 510 from 515 and we're left with 5.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Going ahead to step 6:
85 goes into 50 0 times with a remainder of 50.
The next digit of our result is 0. 
Result so far: 186.0
Subtracting 0 from 50 leaves us with 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Step 7:
85 goes into 500 5 times with a remainder of 75.
Put 5 as the next digit of the answer. 
Result so far: 186.05
Subtracting 425 from 500 leaves us with 75.
Since there are no more digits in the dividend, we add a zero to the remainder making it 750, and continue the process.

Let's proceed to step 8:
The number 85 fits into 750 8 times, leaving a remainder of 70.
Write down 8 as next digit of the result. 
Result so far: 186.058
If we subtract 680 from 750, we get 70.
Since there are no more digits in the dividend, we add a zero to the remainder making it 700, and continue the process.

Let's proceed to step 9:
If we divide 700 by 85, we get 8 and a remainder of 20.
Use 8 as the next digit of our solution. 
Result so far: 186.0588
Subtract 680 from 700 to get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Our division results in 186.0588 with a remaining 0.0002.