steel pipe is 30 meters long, cut off the full length (1/3) for the first time, and cut off the rest (1/3) for the second time, how many meters are left?
一根钢管长30米，第一次截去全长的(1/3)，第二次截去剩下的(1/3)，还剩多少米？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">30 * (2/3) * (2/3)</gadget>
<output>40/3 = around 13.333333</output>

<result>40/3 = around 13.333333</result>