45553967 ÷ 648 
We're looking to find how many times 648 goes into 45553967.

Moving on to step 1:
The number 648 fits into 4 0 times, leaving a remainder of 4.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 4, we get 4.
Fetch the next digit (5) from the dividend, attach it to 4 and continue: 45 / 648

Let's proceed to step 2:
When dividing 45 by 648, we get 0 with a remainder of 45.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we subtract 0 from 45, we get 45.
Include the next digit (5) from the dividend after 45, then repeat: 455 / 648

Moving on to step 3:
If we divide 455 by 648, we get 0 and a remainder of 455.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we subtract 0 from 455, we get 455.
Append the next digit (5) from the dividend to 455 and continue with: 4555 / 648

Going ahead to step 4:
4555 divided by 648 is 7 with a remainder of 19.
The number 7 becomes the next digit in our result. 
Result so far: 7.0
If we subtract 4536 from 4555, we get 19.
Grab the next digit (3) from the dividend, add it to 19, then carry on: 193 / 648

Advancing to step 5:
The number 648 fits into 193 0 times, leaving a remainder of 193.
The next digit of our result is 0. 
Result so far: 70.0
The remainder is 193 after subtracting 0 from 193.
Take the next digit (9) from the dividend and append it to 193, then repeat: 1939 / 648

Advancing to step 6:
648 goes into 1939 2 times with a remainder of 643.
Write down 2 as next digit of the result. 
Result so far: 702.0
The remainder is 643 after subtracting 1296 from 1939.
Fetch the next digit (6) from the dividend, attach it to 643 and continue: 6436 / 648

Step 7:
If we divide 6436 by 648, we get 9 and a remainder of 604.
The next digit of our result is 9. 
Result so far: 7029.0
If we take 5832 away from 6436, we end up with 604.
Fetch the next digit (7) from the dividend, attach it to 604 and continue: 6047 / 648

Advancing to step 8:
648 goes into 6047 9 times with a remainder of 215.
The number 9 becomes the next digit in our result. 
Result so far: 70299.0
If we subtract 5832 from 6047, we get 215.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2150, and continue the process.

On to step 9:
When dividing 2150 by 648, we get 3 with a remainder of 206.
Record the quotient 3 as the next digit in the result. 
Result so far: 70299.3
Deduct 1944 from 2150 and we're left with 206.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2060, and continue the process.

Advancing to step 10:
2060 divided by 648 is 3 with a remainder of 116.
Put 3 as the next digit of the answer. 
Result so far: 70299.33
Deduct 1944 from 2060 and we're left with 116.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1160, and continue the process.

The final outcome is 70299.33, with a leftover of 0.116.