A rope is 36 meters long. (1/4) is used for the first time, and (1/3) is used for the second time. How many meters are left?
一根绳子长36米，第一次用去(1/4)，第二次用去剩下的(1/3)，还剩下多少米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</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">36 * (3/4) * (2/3)</gadget>
<output>18</output>

<result>18</result>