We're dividing 644717 by 16 
We want to figure out the number of times 644717 can be divided by 16.

Moving on to step 1:
16 goes into 6 0 times with a remainder of 6.
Record the quotient 0 as the next digit in the result. 
Result so far: 0.0
If we subtract 0 from 6, we get 6.
Append the next digit (4) from the dividend to 6 and continue with: 64 / 16

Let's proceed to step 2:
The number 16 fits into 64 4 times, leaving a remainder of 0.
The number 4 becomes the next digit in our result. 
Result so far: 4.0
If we subtract 64 from 64, we get 0.
Append the next digit (4) from the dividend to 0 and continue with: 4 / 16

Step 3:
4 divided by 16 is 0 with a remainder of 4.
Record the quotient 0 as the next digit in the result. 
Result so far: 40.0
Deduct 0 from 4 and we're left with 4.
Append the next digit (7) from the dividend to 4 and continue with: 47 / 16

Advancing to step 4:
The number 16 fits into 47 2 times, leaving a remainder of 15.
The number 2 becomes the next digit in our result. 
Result so far: 402.0
The remainder is 15 after subtracting 32 from 47.
Include the next digit (1) from the dividend after 15, then repeat: 151 / 16

Advancing to step 5:
16 goes into 151 9 times with a remainder of 7.
Record the quotient 9 as the next digit in the result. 
Result so far: 4029.0
Subtract 144 from 151 to get 7.
Append the next digit (7) from the dividend to 7 and continue with: 77 / 16

Moving on to step 6:
When dividing 77 by 16, we get 4 with a remainder of 13.
The next digit of our result is 4. 
Result so far: 40294.0
If we take 64 away from 77, we end up with 13.
Since there are no more digits in the dividend, we add a zero to the remainder making it 130, and continue the process.

Let's proceed to step 7:
The number 16 fits into 130 8 times, leaving a remainder of 2.
Record the quotient 8 as the next digit in the result. 
Result so far: 40294.8
If we take 128 away from 130, we end up 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 8:
16 can be fit into 20 1 times, resulting in a remainder of 4.
Record the quotient 1 as the next digit in the result. 
Result so far: 40294.81
Subtracting 16 from 20 leaves us with 4.
Since there are no more digits in the dividend, we add a zero to the remainder making it 40, and continue the process.

Moving on to step 9:
16 goes into 40 2 times with a remainder of 8.
The next digit of our result is 2. 
Result so far: 40294.812
If we subtract 32 from 40, 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.

Advancing to step 10:
80 divided by 16 is 5 with a remainder of 0.
The number 5 becomes the next digit in our result. 
Result so far: 40294.8125
Deduct 80 from 80 and we're left 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.

Moving on to step 11:
16 goes into 0 0 times with a remainder of 0.
Write down 0 as next digit of the result. 
Result so far: 40294.8125
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 12:
If we divide 0 by 16, we get 0 and a remainder of 0.
Use 0 as the next digit of our solution. 
Result so far: 40294.8125
Deduct 0 from 0 and we're left 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 result is 40294.8125 with a remainder of 0.0.