Let's divide 646450 by 72
Our goal is to divide 646450 by 72.

On to step 1:
When dividing 6 by 72, we get 0 with a remainder of 6.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
The remainder is 6 after subtracting 0 from 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 72

On to step 2:
72 goes into 64 0 times with a remainder of 64.
The number 0 becomes the next digit in our result. 
Result so far: 0.0
Deduct 0 from 64 and we're left with 64.
Fetch the next digit (6) from the dividend, attach it to 64 and continue: 646 / 72

Going ahead to step 3:
646 divided by 72 is 8 with a remainder of 70.
Use 8 as the next digit of our solution. 
Result so far: 8.0
Deduct 576 from 646 and we're left with 70.
Grab the next digit (4) from the dividend, add it to 70, then carry on: 704 / 72

Going ahead to step 4:
72 can be fit into 704 9 times, resulting in a remainder of 56.
Use 9 as the next digit of our solution. 
Result so far: 89.0
Subtract 648 from 704 to get 56.
Bring next digit (5) of the dividend behind the 56 and repeat the process: 565 / 72

Advancing to step 5:
72 goes into 565 7 times with a remainder of 61.
The next digit of our result is 7. 
Result so far: 897.0
Subtract 504 from 565 to get 61.
Include the next digit (0) from the dividend after 61, then repeat: 610 / 72

Going ahead to step 6:
The number 72 fits into 610 8 times, leaving a remainder of 34.
Use 8 as the next digit of our solution. 
Result so far: 8978.0
If we subtract 576 from 610, we get 34.
Since there are no more digits in the dividend, we add a zero to the remainder making it 340, and continue the process.

Going ahead to step 7:
340 divided by 72 is 4 with a remainder of 52.
The number 4 becomes the next digit in our result. 
Result so far: 8978.4
Subtracting 288 from 340 leaves us with 52.
Since there are no more digits in the dividend, we add a zero to the remainder making it 520, and continue the process.

Step 8:
72 can be fit into 520 7 times, resulting in a remainder of 16.
The next digit of our result is 7. 
Result so far: 8978.47
If we take 504 away from 520, we end up with 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Step 9:
160 divided by 72 is 2 with a remainder of 16.
Record the quotient 2 as the next digit in the result. 
Result so far: 8978.472
Subtract 144 from 160 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

Going ahead to step 10:
72 can be fit into 160 2 times, resulting in a remainder of 16.
Use 2 as the next digit of our solution. 
Result so far: 8978.4722
Subtract 144 from 160 to get 16.
Since there are no more digits in the dividend, we add a zero to the remainder making it 160, and continue the process.

The final outcome is 8978.4722, with a leftover of 0.00016.