Let's divide 55576728 by 643
We're looking to find how many times 643 goes into 55576728.

Going ahead to step 1:
The number 643 fits into 5 0 times, leaving a remainder of 5.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 5 leaves us with 5.
Grab the next digit (5) from the dividend, add it to 5, then carry on: 55 / 643

Let's proceed to step 2:
When dividing 55 by 643, we get 0 with a remainder of 55.
Write down 0 as next digit of the result. 
Result so far: 0.0
If we take 0 away from 55, we end up with 55.
Bring next digit (5) of the dividend behind the 55 and repeat the process: 555 / 643

Advancing to step 3:
When dividing 555 by 643, we get 0 with a remainder of 555.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 555, we end up with 555.
Fetch the next digit (7) from the dividend, attach it to 555 and continue: 5557 / 643

Advancing to step 4:
5557 divided by 643 is 8 with a remainder of 413.
Write down 8 as next digit of the result. 
Result so far: 8.0
The remainder is 413 after subtracting 5144 from 5557.
Append the next digit (6) from the dividend to 413 and continue with: 4136 / 643

Moving on to step 5:
643 can be fit into 4136 6 times, resulting in a remainder of 278.
Put 6 as the next digit of the answer. 
Result so far: 86.0
If we take 3858 away from 4136, we end up with 278.
Bring next digit (7) of the dividend behind the 278 and repeat the process: 2787 / 643

Moving on to step 6:
When dividing 2787 by 643, we get 4 with a remainder of 215.
Use 4 as the next digit of our solution. 
Result so far: 864.0
If we subtract 2572 from 2787, we get 215.
Include the next digit (2) from the dividend after 215, then repeat: 2152 / 643

Advancing to step 7:
If we divide 2152 by 643, we get 3 and a remainder of 223.
The number 3 becomes the next digit in our result. 
Result so far: 8643.0
Deduct 1929 from 2152 and we're left with 223.
Grab the next digit (8) from the dividend, add it to 223, then carry on: 2238 / 643

Going ahead to step 8:
2238 divided by 643 is 3 with a remainder of 309.
The next digit of our result is 3. 
Result so far: 86433.0
The remainder is 309 after subtracting 1929 from 2238.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3090, and continue the process.

Let's proceed to step 9:
3090 divided by 643 is 4 with a remainder of 518.
The number 4 becomes the next digit in our result. 
Result so far: 86433.4
If we subtract 2572 from 3090, we get 518.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5180, and continue the process.

On to step 10:
643 can be fit into 5180 8 times, resulting in a remainder of 36.
Write down 8 as next digit of the result. 
Result so far: 86433.48
Subtract 5144 from 5180 to get 36.
Since there are no more digits in the dividend, we add a zero to the remainder making it 360, and continue the process.

Step 11:
643 goes into 360 0 times with a remainder of 360.
The next digit of our result is 0. 
Result so far: 86433.48
If we take 0 away from 360, we end up with 360.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3600, and continue the process.

Moving on to step 12:
The number 643 fits into 3600 5 times, leaving a remainder of 385.
The next digit of our result is 5. 
Result so far: 86433.4805
If we subtract 3215 from 3600, we get 385.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3850, and continue the process.

Going ahead to step 13:
643 goes into 3850 5 times with a remainder of 635.
Put 5 as the next digit of the answer. 
Result so far: 86433.48055
If we subtract 3215 from 3850, we get 635.
Since there are no more digits in the dividend, we add a zero to the remainder making it 6350, and continue the process.

The final result is 86433.48055 with a remainder of 0.000635.