After cutting (1/3) off a 2-meter-long rope, and then cutting off (1/3) meter, how many meters are left?
把一条2米长的绳子剪去(1/3)后，再剪去(1/3)米，还剩下多少米．
<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 - (2/3) - (1/3)</gadget>
<output>1</output>

<result>1</result>