The cafeteria brought 80 bags of rice, and after eating part of it, there was still (1/5) left. How many bags were eaten?
食堂运来80袋大米，吃去一部分后，还剩下(1/5)，吃去了多少袋？
<gadget id="calculator">1 / 5</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>