We look at the division of 639764 by 16 
We're looking to find how many times 16 goes into 639764.

Step 1:
6 divided by 16 is 0 with a remainder of 6.
Put 0 as the next digit of the answer. 
Result so far: 0.0
Deduct 0 from 6 and we're left with 6.
Take the next digit (3) from the dividend and append it to 6, then repeat: 63 / 16

Step 2:
16 goes into 63 3 times with a remainder of 15.
Put 3 as the next digit of the answer. 
Result so far: 3.0
Deduct 48 from 63 and we're left with 15.
Append the next digit (9) from the dividend to 15 and continue with: 159 / 16

On to step 3:
16 goes into 159 9 times with a remainder of 15.
The number 9 becomes the next digit in our result. 
Result so far: 39.0
Deduct 144 from 159 and we're left with 15.
Include the next digit (7) from the dividend after 15, then repeat: 157 / 16

Moving on to step 4:
If we divide 157 by 16, we get 9 and a remainder of 13.
Put 9 as the next digit of the answer. 
Result so far: 399.0
If we subtract 144 from 157, we get 13.
Include the next digit (6) from the dividend after 13, then repeat: 136 / 16

On to step 5:
16 goes into 136 8 times with a remainder of 8.
Record the quotient 8 as the next digit in the result. 
Result so far: 3998.0
If we subtract 128 from 136, we get 8.
Grab the next digit (4) from the dividend, add it to 8, then carry on: 84 / 16

Let's proceed to step 6:
If we divide 84 by 16, we get 5 and a remainder of 4.
Use 5 as the next digit of our solution. 
Result so far: 39985.0
Subtracting 80 from 84 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.

Advancing to step 7:
16 can be fit into 40 2 times, resulting in a remainder of 8.
Record the quotient 2 as the next digit in the result. 
Result so far: 39985.2
Subtracting 32 from 40 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.

Let's proceed to step 8:
When dividing 80 by 16, we get 5 with a remainder of 0.
The next digit of our result is 5. 
Result so far: 39985.25
If we subtract 80 from 80, we get 0.
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 9:
16 can be fit into 0 0 times, resulting in a remainder of 0.
Put 0 as the next digit of the answer. 
Result so far: 39985.25
If we take 0 away from 0, we end up 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.

Step 10:
When dividing 0 by 16, we get 0 with a remainder of 0.
Record the quotient 0 as the next digit in the result. 
Result so far: 39985.25
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 39985.25, with a leftover of 0.0.