We're dividing 393212 by 15 
Let's see how many times 15 fits into 393212.

On to step 1:
3 divided by 15 is 0 with a remainder of 3.
Put 0 as the next digit of the answer. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Fetch the next digit (9) from the dividend, attach it to 3 and continue: 39 / 15

On to step 2:
39 divided by 15 is 2 with a remainder of 9.
The next digit of our result is 2. 
Result so far: 2.0
The remainder is 9 after subtracting 30 from 39.
Grab the next digit (3) from the dividend, add it to 9, then carry on: 93 / 15

Going ahead to step 3:
15 can be fit into 93 6 times, resulting in a remainder of 3.
Record the quotient 6 as the next digit in the result. 
Result so far: 26.0
Deduct 90 from 93 and we're left with 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 15

Moving on to step 4:
15 can be fit into 32 2 times, resulting in a remainder of 2.
The next digit of our result is 2. 
Result so far: 262.0
Subtracting 30 from 32 leaves us with 2.
Append the next digit (1) from the dividend to 2 and continue with: 21 / 15

Let's proceed to step 5:
If we divide 21 by 15, we get 1 and a remainder of 6.
Use 1 as the next digit of our solution. 
Result so far: 2621.0
Subtract 15 from 21 to get 6.
Fetch the next digit (2) from the dividend, attach it to 6 and continue: 62 / 15

Advancing to step 6:
The number 15 fits into 62 4 times, leaving a remainder of 2.
The next digit of our result is 4. 
Result so far: 26214.0
Subtract 60 from 62 to get 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 7:
15 goes into 20 1 times with a remainder of 5.
Write down 1 as next digit of the result. 
Result so far: 26214.1
If we take 15 away from 20, 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.

Step 8:
50 divided by 15 is 3 with a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 26214.13
Subtracting 45 from 50 leaves us 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.

On to step 9:
15 can be fit into 50 3 times, resulting in a remainder of 5.
The number 3 becomes the next digit in our result. 
Result so far: 26214.133
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.

After the division, we end up with 26214.133 and a remainder of 0.0005.