Tom bought 10 packages of miniature racing cars. Each package contains five cars. He gave each of his two nephews 1/5 of the cars. How many miniature racing cars are left with Tom?
Tom had 10 x 5 = 
<gadget id="calculator">10*5</gadget>
<output>50</output>
50 miniature racing cars.
Tom gave 50 x 1/5 = 
<gadget id="calculator">50*1/5</gadget>
<output>10</output>
10 miniature racing cars to each of his two nephews.
So, he gave a total of 10 x 2 = 
<gadget id="calculator">10*2</gadget>
<output>20</output>
20 cars to his two nephews.
Therefore, Tom is left with 50 - 20 = 
<gadget id="calculator">50-20</gadget>
<output>30</output>
30 miniature racing cars.

<result>30</result>