My younger sister is 12 years old this year, which is 3/4 of my brother's age. How old is my brother this year?
妹妹今年12岁，是哥哥的年龄的(3/4)，哥哥今年多少岁．
<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">12 / (3/4)</gadget>
<output>16</output>

<result>16</result>