A bamboo pole is 8 meters long, how many meters are left after (1/4) of it is used up?
一根竹竿长8米，用去它的(1/4)后，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">8 * (3/4)</gadget>
<output>6</output>

<result>6</result>