We're dividing 53611728 by 643 
Our goal is to divide 53611728 by 643.

Let's proceed to step 1:
5 divided by 643 is 0 with a remainder of 5.
Write down 0 as next digit of the result. 
Result so far: 0.0
The remainder is 5 after subtracting 0 from 5.
Grab the next digit (3) from the dividend, add it to 5, then carry on: 53 / 643

Step 2:
The number 643 fits into 53 0 times, leaving a remainder of 53.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtract 0 from 53 to get 53.
Grab the next digit (6) from the dividend, add it to 53, then carry on: 536 / 643

On to step 3:
The number 643 fits into 536 0 times, leaving a remainder of 536.
Put 0 as the next digit of the answer. 
Result so far: 0.0
The remainder is 536 after subtracting 0 from 536.
Include the next digit (1) from the dividend after 536, then repeat: 5361 / 643

Advancing to step 4:
When dividing 5361 by 643, we get 8 with a remainder of 217.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Deduct 5144 from 5361 and we're left with 217.
Grab the next digit (1) from the dividend, add it to 217, then carry on: 2171 / 643

Step 5:
643 can be fit into 2171 3 times, resulting in a remainder of 242.
The next digit of our result is 3. 
Result so far: 83.0
Subtract 1929 from 2171 to get 242.
Grab the next digit (7) from the dividend, add it to 242, then carry on: 2427 / 643

Moving on to step 6:
If we divide 2427 by 643, we get 3 and a remainder of 498.
Put 3 as the next digit of the answer. 
Result so far: 833.0
Subtracting 1929 from 2427 leaves us with 498.
Fetch the next digit (2) from the dividend, attach it to 498 and continue: 4982 / 643

Moving on to step 7:
643 can be fit into 4982 7 times, resulting in a remainder of 481.
Write down 7 as next digit of the result. 
Result so far: 8337.0
Subtracting 4501 from 4982 leaves us with 481.
Fetch the next digit (8) from the dividend, attach it to 481 and continue: 4818 / 643

Let's proceed to step 8:
643 can be fit into 4818 7 times, resulting in a remainder of 317.
The next digit of our result is 7. 
Result so far: 83377.0
Subtracting 4501 from 4818 leaves us with 317.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3170, and continue the process.

Advancing to step 9:
643 can be fit into 3170 4 times, resulting in a remainder of 598.
The number 4 becomes the next digit in our result. 
Result so far: 83377.4
If we subtract 2572 from 3170, we get 598.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5980, and continue the process.

Going ahead to step 10:
The number 643 fits into 5980 9 times, leaving a remainder of 193.
Use 9 as the next digit of our solution. 
Result so far: 83377.49
Subtract 5787 from 5980 to get 193.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1930, and continue the process.

Going ahead to step 11:
643 can be fit into 1930 3 times, resulting in a remainder of 1.
The number 3 becomes the next digit in our result. 
Result so far: 83377.493
Deduct 1929 from 1930 and we're left with 1.
Since there are no more digits in the dividend, we add a zero to the remainder making it 10, and continue the process.

Advancing to step 12:
When dividing 10 by 643, we get 0 with a remainder of 10.
Write down 0 as next digit of the result. 
Result so far: 83377.493
The remainder is 10 after subtracting 0 from 10.
Since there are no more digits in the dividend, we add a zero to the remainder making it 100, and continue the process.

Going ahead to step 13:
The number 643 fits into 100 0 times, leaving a remainder of 100.
Use 0 as the next digit of our solution. 
Result so far: 83377.493
If we subtract 0 from 100, we get 100.
Since there are no more digits in the dividend, we add a zero to the remainder making it 1000, and continue the process.

Our division results in 83377.493 with a remaining 0.0001.