Let's divide 78397254 by 648
We want to divide 78397254 by 648.

Moving on to step 1:
648 can be fit into 7 0 times, resulting in a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 0.0
Deduct 0 from 7 and we're left with 7.
Include the next digit (8) from the dividend after 7, then repeat: 78 / 648

Going ahead to step 2:
The number 648 fits into 78 0 times, leaving a remainder of 78.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 78 after subtracting 0 from 78.
Fetch the next digit (3) from the dividend, attach it to 78 and continue: 783 / 648

Step 3:
When dividing 783 by 648, we get 1 with a remainder of 135.
The number 1 becomes the next digit in our result. 
Result so far: 1.0
Subtract 648 from 783 to get 135.
Take the next digit (9) from the dividend and append it to 135, then repeat: 1359 / 648

Moving on to step 4:
1359 divided by 648 is 2 with a remainder of 63.
The number 2 becomes the next digit in our result. 
Result so far: 12.0
If we take 1296 away from 1359, we end up with 63.
Take the next digit (7) from the dividend and append it to 63, then repeat: 637 / 648

Step 5:
648 goes into 637 0 times with a remainder of 637.
Record the quotient 0 as the next digit in the result. 
Result so far: 120.0
Subtracting 0 from 637 leaves us with 637.
Include the next digit (2) from the dividend after 637, then repeat: 6372 / 648

On to step 6:
The number 648 fits into 6372 9 times, leaving a remainder of 540.
The next digit of our result is 9. 
Result so far: 1209.0
Subtracting 5832 from 6372 leaves us with 540.
Fetch the next digit (5) from the dividend, attach it to 540 and continue: 5405 / 648

Moving on to step 7:
5405 divided by 648 is 8 with a remainder of 221.
Use 8 as the next digit of our solution. 
Result so far: 12098.0
The remainder is 221 after subtracting 5184 from 5405.
Grab the next digit (4) from the dividend, add it to 221, then carry on: 2214 / 648

Moving on to step 8:
The number 648 fits into 2214 3 times, leaving a remainder of 270.
The number 3 becomes the next digit in our result. 
Result so far: 120983.0
Subtracting 1944 from 2214 leaves us with 270.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2700, and continue the process.

Moving on to step 9:
648 can be fit into 2700 4 times, resulting in a remainder of 108.
The number 4 becomes the next digit in our result. 
Result so far: 120983.4
Deduct 2592 from 2700 and we're left with 108.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1080, and continue the process.

Advancing to step 10:
648 goes into 1080 1 times with a remainder of 432.
Write down 1 as next digit of the result. 
Result so far: 120983.41
The remainder is 432 after subtracting 648 from 1080.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Advancing to step 11:
648 can be fit into 4320 6 times, resulting in a remainder of 432.
Put 6 as the next digit of the answer. 
Result so far: 120983.416
Subtract 3888 from 4320 to get 432.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

Going ahead to step 12:
When dividing 4320 by 648, we get 6 with a remainder of 432.
Record the quotient 6 as the next digit in the result. 
Result so far: 120983.4166
The remainder is 432 after subtracting 3888 from 4320.
Since there are no more digits in the dividend, we add a zero to the remainder making it 4320, and continue the process.

The final result is 120983.4166 with a remainder of 0.00432.