We're dividing 54448572 by 643 
We're looking to find how many times 643 goes into 54448572.

Advancing to step 1:
If we divide 5 by 643, we get 0 and a remainder of 5.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we take 0 away from 5, we end up with 5.
Bring next digit (4) of the dividend behind the 5 and repeat the process: 54 / 643

Let's proceed to step 2:
When dividing 54 by 643, we get 0 with a remainder of 54.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 54 leaves us with 54.
Take the next digit (4) from the dividend and append it to 54, then repeat: 544 / 643

Advancing to step 3:
544 divided by 643 is 0 with a remainder of 544.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 544, we end up with 544.
Fetch the next digit (4) from the dividend, attach it to 544 and continue: 5444 / 643

Let's proceed to step 4:
The number 643 fits into 5444 8 times, leaving a remainder of 300.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Subtracting 5144 from 5444 leaves us with 300.
Include the next digit (8) from the dividend after 300, then repeat: 3008 / 643

On to step 5:
The number 643 fits into 3008 4 times, leaving a remainder of 436.
Put 4 as the next digit of the answer. 
Result so far: 84.0
If we take 2572 away from 3008, we end up with 436.
Append the next digit (5) from the dividend to 436 and continue with: 4365 / 643

Going ahead to step 6:
643 goes into 4365 6 times with a remainder of 507.
Put 6 as the next digit of the answer. 
Result so far: 846.0
If we take 3858 away from 4365, we end up with 507.
Append the next digit (7) from the dividend to 507 and continue with: 5077 / 643

Let's proceed to step 7:
643 can be fit into 5077 7 times, resulting in a remainder of 576.
Use 7 as the next digit of our solution. 
Result so far: 8467.0
The remainder is 576 after subtracting 4501 from 5077.
Bring next digit (2) of the dividend behind the 576 and repeat the process: 5762 / 643

Advancing to step 8:
643 can be fit into 5762 8 times, resulting in a remainder of 618.
The number 8 becomes the next digit in our result. 
Result so far: 84678.0
Deduct 5144 from 5762 and we're left with 618.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6180, and continue the process.

Let's proceed to step 9:
643 can be fit into 6180 9 times, resulting in a remainder of 393.
Put 9 as the next digit of the answer. 
Result so far: 84678.9
If we subtract 5787 from 6180, we get 393.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3930, and continue the process.

Moving on to step 10:
When dividing 3930 by 643, we get 6 with a remainder of 72.
Use 6 as the next digit of our solution. 
Result so far: 84678.96
The remainder is 72 after subtracting 3858 from 3930.
Since there are no more digits in the dividend, we add a zero to the remainder making it 720, and continue the process.

Moving on to step 11:
643 goes into 720 1 times with a remainder of 77.
Use 1 as the next digit of our solution. 
Result so far: 84678.961
The remainder is 77 after subtracting 643 from 720.
Since there are no more digits in the dividend, we add a zero to the remainder making it 770, and continue the process.

Step 12:
643 can be fit into 770 1 times, resulting in a remainder of 127.
The number 1 becomes the next digit in our result. 
Result so far: 84678.9611
If we take 643 away from 770, we end up with 127.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1270, and continue the process.

The final result is 84678.9611 with a remainder of 0.00127.