A bunch of apples, and (1/3) of them are transported away, then, what is left is the amount of all apples
一堆苹果，运走了其中的(1/3)，那么，剩下的是全部苹果的多少
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<result>2/3 = around 0.666667</result>