643175 divided by 72 
Let's see how many times 72 fits into 643175.

Advancing to step 1:
6 divided by 72 is 0 with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Take the next digit (4) from the dividend and append it to 6, then repeat: 64 / 72

Step 2:
The number 72 fits into 64 0 times, leaving a remainder of 64.
Use 0 as the next digit of our solution. 
Result so far: 0.0
Subtracting 0 from 64 leaves us with 64.
Include the next digit (3) from the dividend after 64, then repeat: 643 / 72

Step 3:
72 goes into 643 8 times with a remainder of 67.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
If we subtract 576 from 643, we get 67.
Take the next digit (1) from the dividend and append it to 67, then repeat: 671 / 72

Moving on to step 4:
671 divided by 72 is 9 with a remainder of 23.
Write down 9 as next digit of the result. 
Result so far: 89.0
Deduct 648 from 671 and we're left with 23.
Append the next digit (7) from the dividend to 23 and continue with: 237 / 72

Let's proceed to step 5:
If we divide 237 by 72, we get 3 and a remainder of 21.
The next digit of our result is 3. 
Result so far: 893.0
Subtracting 216 from 237 leaves us with 21.
Include the next digit (5) from the dividend after 21, then repeat: 215 / 72

Moving on to step 6:
72 can be fit into 215 2 times, resulting in a remainder of 71.
The number 2 becomes the next digit in our result. 
Result so far: 8932.0
If we subtract 144 from 215, we get 71.
Since there are no more digits in the dividend, we add a zero to the remainder making it 710, and continue the process.

Moving on to step 7:
The number 72 fits into 710 9 times, leaving a remainder of 62.
The next digit of our result is 9. 
Result so far: 8932.9
If we take 648 away from 710, we end up with 62.
Since there are no more digits in the dividend, we add a zero to the remainder making it 620, and continue the process.

Let's proceed to step 8:
If we divide 620 by 72, we get 8 and a remainder of 44.
The number 8 becomes the next digit in our result. 
Result so far: 8932.98
If we take 576 away from 620, we end up with 44.
Since there are no more digits in the dividend, we add a zero to the remainder making it 440, and continue the process.

Going ahead to step 9:
If we divide 440 by 72, we get 6 and a remainder of 8.
Write down 6 as next digit of the result. 
Result so far: 8932.986
If we subtract 432 from 440, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Going ahead to step 10:
72 can be fit into 80 1 times, resulting in a remainder of 8.
Write down 1 as next digit of the result. 
Result so far: 8932.9861
If we subtract 72 from 80, we get 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

Step 11:
72 goes into 80 1 times with a remainder of 8.
Put 1 as the next digit of the answer. 
Result so far: 8932.98611
Deduct 72 from 80 and we're left with 8.
Since there are no more digits in the dividend, we add a zero to the remainder making it 80, and continue the process.

The final result is 8932.98611 with a remainder of 8e-06.