An 80m long rope is used up (3/5), how many meters are left? Write the parallel equation of the quantitative relationship.
一根80m长的绳子，用去(3/5)，还剩多少米？写出数量关系并列式．
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">80 * (2/5)</gadget>
<output>32</output>

<result>32</result>