We're dividing 648608 by 40 
We're looking to find how many times 40 goes into 648608.

Moving on to step 1:
6 divided by 40 is 0 with a remainder of 6.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 40

Let's proceed to step 2:
If we divide 64 by 40, we get 1 and a remainder of 24.
Write down 1 as next digit of the result. 
Result so far: 1.0
If we subtract 40 from 64, we get 24.
Fetch the next digit (8) from the dividend, attach it to 24 and continue: 248 / 40

On to step 3:
40 can be fit into 248 6 times, resulting in a remainder of 8.
Put 6 as the next digit of the answer. 
Result so far: 16.0
If we subtract 240 from 248, we get 8.
Include the next digit (6) from the dividend after 8, then repeat: 86 / 40

Going ahead to step 4:
86 divided by 40 is 2 with a remainder of 6.
The number 2 becomes the next digit in our result. 
Result so far: 162.0
If we subtract 80 from 86, we get 6.
Take the next digit (0) from the dividend and append it to 6, then repeat: 60 / 40

Step 5:
40 can be fit into 60 1 times, resulting in a remainder of 20.
Record the quotient 1 as the next digit in the result. 
Result so far: 1621.0
If we take 40 away from 60, we end up with 20.
Grab the next digit (8) from the dividend, add it to 20, then carry on: 208 / 40

Going ahead to step 6:
When dividing 208 by 40, we get 5 with a remainder of 8.
Use 5 as the next digit of our solution. 
Result so far: 16215.0
Deduct 200 from 208 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Moving on to step 7:
The number 40 fits into 80 2 times, leaving a remainder of 0.
Put 2 as the next digit of the answer. 
Result so far: 16215.2
Subtract 80 from 80 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.

On to step 8:
The number 40 fits into 0 0 times, leaving a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 16215.2
The remainder is 0 after subtracting 0 from 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 9:
The number 40 fits into 0 0 times, leaving a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 16215.2
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.

The final result is 16215.2 with a remainder of 0.0.