We're dividing 643973 by 72 
We want to divide 643973 by 72.

On to step 1:
The number 72 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
The remainder is 6 after subtracting 0 from 6.
Fetch the next digit (4) from the dividend, attach it to 6 and continue: 64 / 72

On to step 2:
64 divided by 72 is 0 with a remainder of 64.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 64, we get 64.
Grab the next digit (3) from the dividend, add it to 64, then carry on: 643 / 72

On to step 3:
The number 72 fits into 643 8 times, leaving a remainder of 67.
Record the quotient 8 as the next digit in the result. 
Result so far: 8.0
Subtract 576 from 643 to get 67.
Append the next digit (9) from the dividend to 67 and continue with: 679 / 72

Let's proceed to step 4:
When dividing 679 by 72, we get 9 with a remainder of 31.
Write down 9 as next digit of the result. 
Result so far: 89.0
The remainder is 31 after subtracting 648 from 679.
Append the next digit (7) from the dividend to 31 and continue with: 317 / 72

Let's proceed to step 5:
If we divide 317 by 72, we get 4 and a remainder of 29.
Write down 4 as next digit of the result. 
Result so far: 894.0
If we take 288 away from 317, we end up with 29.
Fetch the next digit (3) from the dividend, attach it to 29 and continue: 293 / 72

Let's proceed to step 6:
72 goes into 293 4 times with a remainder of 5.
Use 4 as the next digit of our solution. 
Result so far: 8944.0
The remainder is 5 after subtracting 288 from 293.
Since there are no more digits in the dividend, we add a zero to the remainder making it 50, and continue the process.

On to step 7:
72 goes into 50 0 times with a remainder of 50.
Put 0 as the next digit of the answer. 
Result so far: 8944.0
Subtract 0 from 50 to get 50.
Since there are no more digits in the dividend, we add a zero to the remainder making it 500, and continue the process.

Moving on to step 8:
When dividing 500 by 72, we get 6 with a remainder of 68.
Use 6 as the next digit of our solution. 
Result so far: 8944.06
Subtracting 432 from 500 leaves us with 68.
Since there are no more digits in the dividend, we add a zero to the remainder making it 680, and continue the process.

Moving on to step 9:
If we divide 680 by 72, we get 9 and a remainder of 32.
Record the quotient 9 as the next digit in the result. 
Result so far: 8944.069
Deduct 648 from 680 and we're left with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Moving on to step 10:
When dividing 320 by 72, we get 4 with a remainder of 32.
The next digit of our result is 4. 
Result so far: 8944.0694
Subtracting 288 from 320 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

Advancing to step 11:
When dividing 320 by 72, we get 4 with a remainder of 32.
Write down 4 as next digit of the result. 
Result so far: 8944.06944
Subtracting 288 from 320 leaves us with 32.
Since there are no more digits in the dividend, we add a zero to the remainder making it 320, and continue the process.

After the division, we end up with 8944.06944 and a remainder of 3.2e-05.