There are 80 cars parked in the parking lot, and the number of trucks parked is 20% less than that of cars. How many trucks are there?
停车场停放小汽车80辆，停放的货车比小汽车少20%，停放的货车有多少辆？
<gadget id="calculator">20 / 100</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">80 * (4/5)</gadget>
<output>64</output>

<result>64</result>