We're dividing 7504101 by 648 
We want to figure out the number of times 7504101 can be divided by 648.

On to step 1:
7 divided by 648 is 0 with a remainder of 7.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 7 after subtracting 0 from 7.
Grab the next digit (5) from the dividend, add it to 7, then carry on: 75 / 648

On to step 2:
648 goes into 75 0 times with a remainder of 75.
The next digit of our result is 0. 
Result so far: 0.0
Deduct 0 from 75 and we're left with 75.
Append the next digit (0) from the dividend to 75 and continue with: 750 / 648

Step 3:
648 can be fit into 750 1 times, resulting in a remainder of 102.
Use 1 as the next digit of our solution. 
Result so far: 1.0
Subtracting 648 from 750 leaves us with 102.
Take the next digit (4) from the dividend and append it to 102, then repeat: 1024 / 648

Going ahead to step 4:
648 goes into 1024 1 times with a remainder of 376.
Record the quotient 1 as the next digit in the result. 
Result so far: 11.0
If we take 648 away from 1024, we end up with 376.
Include the next digit (1) from the dividend after 376, then repeat: 3761 / 648

Moving on to step 5:
648 can be fit into 3761 5 times, resulting in a remainder of 521.
Write down 5 as next digit of the result. 
Result so far: 115.0
If we subtract 3240 from 3761, we get 521.
Grab the next digit (0) from the dividend, add it to 521, then carry on: 5210 / 648

Going ahead to step 6:
If we divide 5210 by 648, we get 8 and a remainder of 26.
Record the quotient 8 as the next digit in the result. 
Result so far: 1158.0
The remainder is 26 after subtracting 5184 from 5210.
Grab the next digit (1) from the dividend, add it to 26, then carry on: 261 / 648

Advancing to step 7:
The number 648 fits into 261 0 times, leaving a remainder of 261.
The number 0 becomes the next digit in our result. 
Result so far: 11580.0
Subtracting 0 from 261 leaves us with 261.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2610, and continue the process.

Moving on to step 8:
648 goes into 2610 4 times with a remainder of 18.
The next digit of our result is 4. 
Result so far: 11580.4
If we subtract 2592 from 2610, we get 18.
Since there are no more digits in the dividend, we add a zero to the remainder making it 180, and continue the process.

Moving on to step 9:
648 can be fit into 180 0 times, resulting in a remainder of 180.
The next digit of our result is 0. 
Result so far: 11580.4
Deduct 0 from 180 and we're left with 180.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1800, and continue the process.

Advancing to step 10:
If we divide 1800 by 648, we get 2 and a remainder of 504.
The number 2 becomes the next digit in our result. 
Result so far: 11580.402
Subtracting 1296 from 1800 leaves us with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Let's proceed to step 11:
5040 divided by 648 is 7 with a remainder of 504.
Use 7 as the next digit of our solution. 
Result so far: 11580.4027
Subtract 4536 from 5040 to get 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

Step 12:
The number 648 fits into 5040 7 times, leaving a remainder of 504.
Use 7 as the next digit of our solution. 
Result so far: 11580.40277
Subtracting 4536 from 5040 leaves us with 504.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5040, and continue the process.

After the division, we end up with 11580.40277 and a remainder of 0.000504.