32 meters long steel bar, 8 meters are used for the first time, and the remaining (1/3) is used for the second time, how many meters are left?
32米长的钢筋，第一次用去8米，第二次用去剩下的(1/3)，还有多少米．
<gadget id="calculator">32 - 8</gadget>
<output>24</output>

<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">24 * (2/3)</gadget>
<output>16</output>

<result>16</result>