The number of pine trees planted in the school is less than that of cypress trees (1/5), and the number of pine trees is as much as that of cypress trees.
学校栽的松树比柏树少(1/5)，松树是柏树的多少．
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">1 - (1/5)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>