We're dividing 398497 by 15 
Our goal is to divide 398497 by 15.

Step 1:
15 can be fit into 3 0 times, resulting in a remainder of 3.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 3, we get 3.
Append the next digit (9) from the dividend to 3 and continue with: 39 / 15

Step 2:
The number 15 fits into 39 2 times, leaving a remainder of 9.
Write down 2 as next digit of the result. 
Result so far: 2.0
The remainder is 9 after subtracting 30 from 39.
Take the next digit (8) from the dividend and append it to 9, then repeat: 98 / 15

On to step 3:
98 divided by 15 is 6 with a remainder of 8.
Use 6 as the next digit of our solution. 
Result so far: 26.0
Deduct 90 from 98 and we're left with 8.
Take the next digit (4) from the dividend and append it to 8, then repeat: 84 / 15

Moving on to step 4:
If we divide 84 by 15, we get 5 and a remainder of 9.
The number 5 becomes the next digit in our result. 
Result so far: 265.0
If we take 75 away from 84, we end up with 9.
Grab the next digit (9) from the dividend, add it to 9, then carry on: 99 / 15

Going ahead to step 5:
15 goes into 99 6 times with a remainder of 9.
Record the quotient 6 as the next digit in the result. 
Result so far: 2656.0
If we take 90 away from 99, we end up with 9.
Bring next digit (7) of the dividend behind the 9 and repeat the process: 97 / 15

Step 6:
97 divided by 15 is 6 with a remainder of 7.
Put 6 as the next digit of the answer. 
Result so far: 26566.0
Subtracting 90 from 97 leaves us with 7.
Since there are no more digits in the dividend, we add a zero to the remainder making it 70, and continue the process.

Going ahead to step 7:
15 can be fit into 70 4 times, resulting in a remainder of 10.
The next digit of our result is 4. 
Result so far: 26566.4
Subtract 60 from 70 to get 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Let's proceed to step 8:
The number 15 fits into 100 6 times, leaving a remainder of 10.
Use 6 as the next digit of our solution. 
Result so far: 26566.46
Subtracting 90 from 100 leaves us with 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Step 9:
15 can be fit into 100 6 times, resulting in a remainder of 10.
The number 6 becomes the next digit in our result. 
Result so far: 26566.466
The remainder is 10 after subtracting 90 from 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

The final outcome is 26566.466, with a leftover of 0.001.