Michael has 4 packs of crayons and wants to buy 2 more. One pack of crayons costs $2.5. How much are all the packs of crayons Michael will have after the purchase worth?
After buying 2 more packs, Michael is going to have 4 packs + 2 packs = 
<gadget id="calculator">4+2</gadget>
<output>6</output>
6 packs of crayons.
In total all packs are going to be worth 6 packs * $2.5/pack = $
<gadget id="calculator">6*2.5</gadget>
<output>15</output>
15.

<result>15</result>