Mother's age is grandma's (1/2), and Xiaogang's age is mother's (1/3). Grandma is 72 years old, how old is Xiao Gang?
妈妈的年龄是外婆的(1/2)，小刚的年龄是妈妈的(1/3)．外婆今年72岁，小刚今年多少岁？
<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">72 * (1/2) * (1/3)</gadget>
<output>12</output>

<result>12</result>