We look at the division of 639494 by 16 
We're looking to find how many times 16 goes into 639494.

Advancing to step 1:
16 goes into 6 0 times 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.
Append the next digit (3) from the dividend to 6 and continue with: 63 / 16

Moving on to step 2:
16 can be fit into 63 3 times, resulting in a remainder of 15.
The number 3 becomes the next digit in our result. 
Result so far: 3.0
Subtract 48 from 63 to get 15.
Grab the next digit (9) from the dividend, add it to 15, then carry on: 159 / 16

Let's proceed to step 3:
16 can be fit into 159 9 times, resulting in a remainder of 15.
Put 9 as the next digit of the answer. 
Result so far: 39.0
If we take 144 away from 159, we end up with 15.
Bring next digit (4) of the dividend behind the 15 and repeat the process: 154 / 16

On to step 4:
154 divided by 16 is 9 with a remainder of 10.
The number 9 becomes the next digit in our result. 
Result so far: 399.0
The remainder is 10 after subtracting 144 from 154.
Fetch the next digit (9) from the dividend, attach it to 10 and continue: 109 / 16

Let's proceed to step 5:
When dividing 109 by 16, we get 6 with a remainder of 13.
The number 6 becomes the next digit in our result. 
Result so far: 3996.0
If we take 96 away from 109, we end up with 13.
Grab the next digit (4) from the dividend, add it to 13, then carry on: 134 / 16

On to step 6:
The number 16 fits into 134 8 times, leaving a remainder of 6.
Record the quotient 8 as the next digit in the result. 
Result so far: 39968.0
Subtracting 128 from 134 leaves us with 6.
Since there are no more digits in the dividend, we add a zero to the remainder making it 60, and continue the process.

On to step 7:
The number 16 fits into 60 3 times, leaving a remainder of 12.
The next digit of our result is 3. 
Result so far: 39968.3
Subtracting 48 from 60 leaves us with 12.
Since there are no more digits in the dividend, we add a zero to the remainder making it 120, and continue the process.

Advancing to step 8:
16 goes into 120 7 times with a remainder of 8.
Put 7 as the next digit of the answer. 
Result so far: 39968.37
Subtract 112 from 120 to 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.

Going ahead to step 9:
16 can be fit into 80 5 times, resulting in a remainder of 0.
Use 5 as the next digit of our solution. 
Result so far: 39968.375
Subtracting 80 from 80 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.

Moving on to step 10:
If we divide 0 by 16, we get 0 and a remainder of 0.
The next digit of our result is 0. 
Result so far: 39968.375
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.

Moving on to step 11:
If we divide 0 by 16, we get 0 and a remainder of 0.
The number 0 becomes the next digit in our result. 
Result so far: 39968.375
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.

The final outcome is 39968.375, with a leftover of 0.0.