Grandpa is 80 years old this year, Xiao Liang's age is grandpa's (1/5), how old is Xiao Liang this year?
爷爷今年80岁，小亮的年龄是爷爷的(1/5)，小亮今年多大？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">80 * (1/5)</gadget>
<output>16</output>

<result>16</result>