Xiaoxiao’s grandfather is 60 years old this year, and his father’s age this year is exactly that of his grandfather (7/12). Xiaoxiao’s age this year is his father’s (2/7). How old is Xiaoxiao?
笑笑的爷爷今年60岁，爸爸今年的年龄正好是爷爷的(7/12)，笑笑今年的年龄又是爸爸的(2/7)，笑笑今年多少岁？
<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">60 * (7/12) * (2/7)</gadget>
<output>10</output>

<result>10</result>