Let's divide 66255273 by 643
Let's see how many times 643 fits into 66255273.

Going ahead to step 1:
The number 643 fits into 6 0 times, leaving a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
Subtracting 0 from 6 leaves us with 6.
Grab the next digit (6) from the dividend, add it to 6, then carry on: 66 / 643

Moving on to step 2:
The number 643 fits into 66 0 times, leaving a remainder of 66.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
If we take 0 away from 66, we end up with 66.
Fetch the next digit (2) from the dividend, attach it to 66 and continue: 662 / 643

Going ahead to step 3:
643 goes into 662 1 times with a remainder of 19.
Put 1 as the next digit of the answer. 
Result so far: 1.0
Subtract 643 from 662 to get 19.
Bring next digit (5) of the dividend behind the 19 and repeat the process: 195 / 643

Let's proceed to step 4:
When dividing 195 by 643, we get 0 with a remainder of 195.
Record the quotient 0 as the next digit in the result. 
Result so far: 10.0
Subtracting 0 from 195 leaves us with 195.
Take the next digit (5) from the dividend and append it to 195, then repeat: 1955 / 643

Step 5:
If we divide 1955 by 643, we get 3 and a remainder of 26.
Use 3 as the next digit of our solution. 
Result so far: 103.0
If we take 1929 away from 1955, we end up with 26.
Bring next digit (2) of the dividend behind the 26 and repeat the process: 262 / 643

On to step 6:
The number 643 fits into 262 0 times, leaving a remainder of 262.
The number 0 becomes the next digit in our result. 
Result so far: 1030.0
If we subtract 0 from 262, we get 262.
Bring next digit (7) of the dividend behind the 262 and repeat the process: 2627 / 643

Step 7:
643 goes into 2627 4 times with a remainder of 55.
The next digit of our result is 4. 
Result so far: 10304.0
Subtract 2572 from 2627 to get 55.
Fetch the next digit (3) from the dividend, attach it to 55 and continue: 553 / 643

Step 8:
553 divided by 643 is 0 with a remainder of 553.
Put 0 as the next digit of the answer. 
Result so far: 103040.0
Subtracting 0 from 553 leaves us with 553.
Since there are no more digits in the dividend, we add a zero to the remainder making it 5530, and continue the process.

Step 9:
643 can be fit into 5530 8 times, resulting in a remainder of 386.
Record the quotient 8 as the next digit in the result. 
Result so far: 103040.8
Deduct 5144 from 5530 and we're left with 386.
Since there are no more digits in the dividend, we add a zero to the remainder making it 3860, and continue the process.

Step 10:
When dividing 3860 by 643, we get 6 with a remainder of 2.
The next digit of our result is 6. 
Result so far: 103040.86
Deduct 3858 from 3860 and we're left with 2.
Since there are no more digits in the dividend, we add a zero to the remainder making it 20, and continue the process.

On to step 11:
643 can be fit into 20 0 times, resulting in a remainder of 20.
The number 0 becomes the next digit in our result. 
Result so far: 103040.86
If we subtract 0 from 20, we get 20.
Since there are no more digits in the dividend, we add a zero to the remainder making it 200, and continue the process.

Moving on to step 12:
If we divide 200 by 643, we get 0 and a remainder of 200.
Record the quotient 0 as the next digit in the result. 
Result so far: 103040.86
If we subtract 0 from 200, we get 200.
Since there are no more digits in the dividend, we add a zero to the remainder making it 2000, and continue the process.

The final outcome is 103040.86, with a leftover of 0.002.