We divide 688440 by 15
We're looking to find how many times 15 goes into 688440.

Advancing 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
Deduct 0 from 6 and we're left with 6.
Include the next digit (8) from the dividend after 6, then repeat: 68 / 15

Let's proceed to step 2:
68 divided by 15 is 4 with a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 60 from 68, we get 8.
Append the next digit (8) from the dividend to 8 and continue with: 88 / 15

Going ahead to step 3:
The number 15 fits into 88 5 times, leaving a remainder of 13.
The next digit of our result is 5. 
Result so far: 45.0
Deduct 75 from 88 and we're left with 13.
Bring next digit (4) of the dividend behind the 13 and repeat the process: 134 / 15

Advancing to step 4:
When dividing 134 by 15, we get 8 with a remainder of 14.
The number 8 becomes the next digit in our result. 
Result so far: 458.0
The remainder is 14 after subtracting 120 from 134.
Grab the next digit (4) from the dividend, add it to 14, then carry on: 144 / 15

Let's proceed to step 5:
15 goes into 144 9 times with a remainder of 9.
Write down 9 as next digit of the result. 
Result so far: 4589.0
Deduct 135 from 144 and we're left with 9.
Take the next digit (0) from the dividend and append it to 9, then repeat: 90 / 15

On to step 6:
15 can be fit into 90 6 times, resulting in a remainder of 0.
Write down 6 as next digit of the result. 
Result so far: 45896.0
Deduct 90 from 90 and we're left with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

On to step 7:
0 divided by 15 is 0 with a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 45896.0
If we subtract 0 from 0, we get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Moving on to step 8:
If we divide 0 by 15, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 45896.0
Subtract 0 from 0 to get 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

After the division, we end up with 45896.0 and a remainder of 0.0.