This year's father's age is 42 years old, and the son's age is younger than his father's (2/3). Do you know how old your son is?
今年爸爸的年龄是42岁，儿子的年龄比爸爸少(2/3)．你知道儿子今年几岁吗？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">42 * (1/3)</gadget>
<output>14</output>

<result>14</result>