The older sister is older than the younger sister (1/3), and the younger sister is 3 years younger than the older sister, so how much is the older sister?
姐姐的年龄比妹妹大(1/3)，妹妹比姐姐小3岁，那么姐姐多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">3 / (1/3)</gadget>
<output>9</output>

<gadget id="calculator">9 + 3</gadget>
<output>12</output>

<result>12</result>