2 meters long steel, if (1/3) is used for the first time, and (1/3) meter is used for the second time, how many meters will be used for the two times?
2米长的钢材，第一次用去(1/3)，第二次用去(1/3)米，则两次共用去多少米．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

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

<gadget id="calculator">(2/3) + (1/3)</gadget>
<output>1</output>

<result>1</result>