A wire is 80 meters long, cut off the full length (2/5) for the first time, and cut off the rest (2/5) for the second time, how many meters is left on the wire?
一根电线长80米，第一次截去全长的(2/5)，第二次截去余下的(2/5)，这根电线还剩多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">6 / 25</gadget>
<output>6/25 = around 0.24</output>

<gadget id="calculator">1 - (2/5) - (6/25)</gadget>
<output>9/25 = around 0.36</output>

<gadget id="calculator">80 * (9/25)</gadget>
<output>144/5 = around 28.8</output>

<result>144/5 = around 28.8</result>