A watermelon, Xiaoxiao ate it (1/6), and my mother ate the rest (1/5), how much is left
一个西瓜，笑笑吃了它的(1/6)，妈妈吃了剩下的(1/5)，还剩多少
<gadget id="calculator">1 / 6</gadget>
<output>1/6 = around 0.166667</output>

<gadget id="calculator">1 - (1/6)</gadget>
<output>5/6 = around 0.833333</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">(5/6) * (4/5)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>