A piece of iron wire is 20 meters long, the first time uses 2/5 of the full length, the second time uses 6 meters, what fraction of the whole length is used the second time?
一根铁丝长20米，第一次用去全长的(2/5)，第二次用去6米，第二次用去全长的几分之几？
<gadget id="calculator">6 / 20</gadget>
<output>3/10 = around 0.3</output>

<result>3/10 = around 0.3</result>