Noah and Ava are planning a trip to the zoo.  Zoo entry tickets are $5 per person.  Bus fare is $1.50 per person one way.  If they bring $40 with them, how much money do they have left to spend on lunch and snacks?
Noah and Ava's zoo entry tickets are $5 x 2 = $
<gadget id="calculator">5*2</gadget>
<output>10</output>
10.
Their round trip bus fare will be $1.50 x 2 x 2 = $
<gadget id="calculator">1.5*2*2</gadget>
<output>6</output>
6.
Zoo tickets and bus fare will cost $10 + $6 = $
<gadget id="calculator">10+6</gadget>
<output>16</output>
16.
For lunch and snacks, they will have $40 - $16 = $
<gadget id="calculator">40-16</gadget>
<output>24</output>
24.

<result>24</result>