A said to B: "My age is three times your age." B said to A: "My age in 5 years is the same as your age 11 years ago." How old is B this year?
甲对乙说："我的年龄是你的3倍．"乙对甲说："我5年后的年龄和你11年前的年龄一样．"乙今年多少岁．
<gadget id="calculator">5 + 11</gadget>
<output>16</output>

<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<result>8</result>