Mike changes tires on different vehicles.  He changes all the tires on 12 motorcycles and all the tires on 10 cars.  How many tires did he change?
He changed 12*2=
<gadget id="calculator">12*2</gadget>
<output>24</output>
24 motorcycle tires.
He changed 10*4=
<gadget id="calculator">10*4</gadget>
<output>40</output>
40 car tires.
So he changed 24+40=
<gadget id="calculator">24+40</gadget>
<output>64</output>
64 total tires.

<result>64</result>