A piece of iron wire is 9 meters long, if (1/3) is used up, how many meters will be used up?
一根铁丝长9米，用去(1/3)，用去多少米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">9 * (1/3)</gadget>
<output>3</output>

<result>3</result>