We look at the division of 643272 by 16 
Let's see how many times 16 fits into 643272.

Advancing to step 1:
If we divide 6 by 16, we get 0 and a remainder of 6.
Write down 0 as next digit of the result. 
Result so far: 0.0
Subtract 0 from 6 to get 6.
Bring next digit (4) of the dividend behind the 6 and repeat the process: 64 / 16

Going ahead to step 2:
The number 16 fits into 64 4 times, leaving a remainder of 0.
Put 4 as the next digit of the answer. 
Result so far: 4.0
Subtract 64 from 64 to get 0.
Bring next digit (3) of the dividend behind the 0 and repeat the process: 3 / 16

Advancing to step 3:
16 goes into 3 0 times with a remainder of 3.
Write down 0 as next digit of the result. 
Result so far: 40.0
If we subtract 0 from 3, we get 3.
Include the next digit (2) from the dividend after 3, then repeat: 32 / 16

Moving on to step 4:
When dividing 32 by 16, we get 2 with a remainder of 0.
Record the quotient 2 as the next digit in the result. 
Result so far: 402.0
If we subtract 32 from 32, we get 0.
Fetch the next digit (7) from the dividend, attach it to 0 and continue: 7 / 16

Step 5:
The number 16 fits into 7 0 times, leaving a remainder of 7.
Write down 0 as next digit of the result. 
Result so far: 4020.0
Subtract 0 from 7 to get 7.
Grab the next digit (2) from the dividend, add it to 7, then carry on: 72 / 16

Moving on to step 6:
16 can be fit into 72 4 times, resulting in a remainder of 8.
The number 4 becomes the next digit in our result. 
Result so far: 40204.0
Subtracting 64 from 72 leaves us 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.

Step 7:
16 goes into 80 5 times with a remainder of 0.
Record the quotient 5 as the next digit in the result. 
Result so far: 40204.5
The remainder is 0 after subtracting 80 from 80.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Let's proceed to step 8:
16 can be fit into 0 0 times, resulting in a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40204.5
The remainder is 0 after subtracting 0 from 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

Going ahead to step 9:
The number 16 fits into 0 0 times, leaving a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40204.5
Subtracting 0 from 0 leaves us with 0.
Since there are no more digits in the dividend, we add a zero to the remainder making it 0, and continue the process.

The final outcome is 40204.5, with a leftover of 0.0.