We're dividing 4887940 by 648 
We want to figure out the number of times 4887940 can be divided by 648.

Advancing to step 1:
4 divided by 648 is 0 with a remainder of 4.
The next digit of our result is 0. 
Result so far: 0.0
The remainder is 4 after subtracting 0 from 4.
Fetch the next digit (8) from the dividend, attach it to 4 and continue: 48 / 648

Step 2:
648 can be fit into 48 0 times, resulting in a remainder of 48.
The next digit of our result is 0. 
Result so far: 0.0
Subtracting 0 from 48 leaves us with 48.
Append the next digit (8) from the dividend to 48 and continue with: 488 / 648

Going ahead to step 3:
The number 648 fits into 488 0 times, leaving a remainder of 488.
Use 0 as the next digit of our solution. 
Result so far: 0.0
The remainder is 488 after subtracting 0 from 488.
Take the next digit (7) from the dividend and append it to 488, then repeat: 4887 / 648

Moving on to step 4:
4887 divided by 648 is 7 with a remainder of 351.
Use 7 as the next digit of our solution. 
Result so far: 7.0
If we take 4536 away from 4887, we end up with 351.
Fetch the next digit (9) from the dividend, attach it to 351 and continue: 3519 / 648

Advancing to step 5:
648 goes into 3519 5 times with a remainder of 279.
Record the quotient 5 as the next digit in the result. 
Result so far: 75.0
If we take 3240 away from 3519, we end up with 279.
Include the next digit (4) from the dividend after 279, then repeat: 2794 / 648

Step 6:
When dividing 2794 by 648, we get 4 with a remainder of 202.
Write down 4 as next digit of the result. 
Result so far: 754.0
Deduct 2592 from 2794 and we're left with 202.
Append the next digit (0) from the dividend to 202 and continue with: 2020 / 648

Let's proceed to step 7:
648 can be fit into 2020 3 times, resulting in a remainder of 76.
Put 3 as the next digit of the answer. 
Result so far: 7543.0
If we take 1944 away from 2020, we end up with 76.
Since there are no more digits in the dividend, we add a zero to the remainder making it 760, and continue the process.

Let's proceed to step 8:
760 divided by 648 is 1 with a remainder of 112.
The next digit of our result is 1. 
Result so far: 7543.1
Subtracting 648 from 760 leaves us with 112.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1120, and continue the process.

On to step 9:
648 goes into 1120 1 times with a remainder of 472.
Write down 1 as next digit of the result. 
Result so far: 7543.11
If we subtract 648 from 1120, we get 472.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4720, and continue the process.

After the division, we end up with 7543.11 and a remainder of 0.472.