We look at the division of 680456 by 15 
We want to figure out the number of times 680456 can be divided by 15.

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
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (8) from the dividend, attach it to 6 and continue: 68 / 15

Let's proceed to step 2:
15 goes into 68 4 times with a remainder of 8.
Record the quotient 4 as the next digit in the result. 
Result so far: 4.0
Subtracting 60 from 68 leaves us with 8.
Include the next digit (0) from the dividend after 8, then repeat: 80 / 15

Going ahead to step 3:
If we divide 80 by 15, we get 5 and a remainder of 5.
Use 5 as the next digit of our solution. 
Result so far: 45.0
Deduct 75 from 80 and we're left with 5.
Append the next digit (4) from the dividend to 5 and continue with: 54 / 15

Advancing to step 4:
15 can be fit into 54 3 times, resulting in a remainder of 9.
The next digit of our result is 3. 
Result so far: 453.0
Subtract 45 from 54 to get 9.
Take the next digit (5) from the dividend and append it to 9, then repeat: 95 / 15

Moving on to step 5:
15 goes into 95 6 times with a remainder of 5.
Write down 6 as next digit of the result. 
Result so far: 4536.0
The remainder is 5 after subtracting 90 from 95.
Bring next digit (6) of the dividend behind the 5 and repeat the process: 56 / 15

Going ahead to step 6:
The number 15 fits into 56 3 times, leaving a remainder of 11.
The next digit of our result is 3. 
Result so far: 45363.0
If we take 45 away from 56, we end up with 11.
Since there are no more digits in the dividend, we add a zero to the remainder making it 110, and continue the process.

Step 7:
110 divided by 15 is 7 with a remainder of 5.
Record the quotient 7 as the next digit in the result. 
Result so far: 45363.7
Deduct 105 from 110 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.

Let's proceed to step 8:
15 goes into 50 3 times with a remainder of 5.
Use 3 as the next digit of our solution. 
Result so far: 45363.73
If we take 45 away from 50, 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.

Moving 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: 45363.733
If we take 45 away from 50, 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.

After the division, we end up with 45363.733 and a remainder of 0.0005.