We divide 636785 by 15
Let's see how many times 15 fits into 636785.

On to step 1:
6 divided by 15 is 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Fetch the next digit (3) from the dividend, attach it to 6 and continue: 63 / 15

Moving on to step 2:
If we divide 63 by 15, we get 4 and a remainder of 3.
The next digit of our result is 4. 
Result so far: 4.0
Deduct 60 from 63 and we're left with 3.
Append the next digit (6) from the dividend to 3 and continue with: 36 / 15

Let's proceed to step 3:
36 divided by 15 is 2 with a remainder of 6.
Put 2 as the next digit of the answer. 
Result so far: 42.0
If we subtract 30 from 36, we get 6.
Include the next digit (7) from the dividend after 6, then repeat: 67 / 15

Let's proceed to step 4:
If we divide 67 by 15, we get 4 and a remainder of 7.
Use 4 as the next digit of our solution. 
Result so far: 424.0
Subtracting 60 from 67 leaves us with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 15

Moving on to step 5:
If we divide 78 by 15, we get 5 and a remainder of 3.
Use 5 as the next digit of our solution. 
Result so far: 4245.0
Subtracting 75 from 78 leaves us with 3.
Grab the next digit (5) from the dividend, add it to 3, then carry on: 35 / 15

Moving on to step 6:
15 goes into 35 2 times with a remainder of 5.
Write down 2 as next digit of the result. 
Result so far: 42452.0
If we take 30 away from 35, we end up 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 7:
50 divided by 15 is 3 with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 42452.3
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

Moving on to step 8:
If we divide 50 by 15, we get 3 and a remainder of 5.
Record the quotient 3 as the next digit in the result. 
Result so far: 42452.33
The remainder is 5 after subtracting 45 from 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

The final result is 42452.33 with a remainder of 0.005.