Tom decides to make lasagna with all his beef.  It takes twice as many noodles as beef.  He has 10 pounds of beef.  He already has 4 pounds of lasagna noodles and the noodles come in 2-pound packages.  How many packages does he need to buy?
He needs 10*2=
<gadget id="calculator">10*2</gadget>
<output>20</output>
20 pounds of noodles.
That means he needs to buy 20-4=
<gadget id="calculator">20-4</gadget>
<output>16</output>
16 pounds of noodles.
So he needs to buy 16/2=
<gadget id="calculator">16/2</gadget>
<output>8</output>
8 packages.

<result>8</result>