A piece of iron wire is 30 meters long. After cutting off (1/6), how many meters are left on it?
一根铁丝长30米，截去(1/6)后，它还剩多少米．
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">30 * (5/6)</gadget>
<output>25</output>

<result>25</result>