The life span of a giant panda is about 20 years, equivalent to (2/5) that of an orangutan. How many years does an orangutan live?
大熊猫的寿命约为20年，相当于猩猩的(2/5)．猩猩的寿命约为多少年？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">20 / (2/5)</gadget>
<output>50</output>

<result>50</result>