A piece of iron wire is 80 meters long. The first time (3/4) of the full length is used, and the second time (3/5) of the first time is used. How many meters is used for the second time?
一根铁丝长80米，第一次用去全长的(3/4)，第二次用去的是第一次的(3/5)，第二次用去多少米？
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">80 * (3/4) * (3/5)</gadget>
<output>36</output>

<result>36</result>