There are 18 balls in a pocket, Xiaoxiao wants to take away (1/3), how many balls should she take.
一个口袋里装有18个球，笑笑要拿走它的(1/3)，她应该拿多少个．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">18 * (1/3)</gadget>
<output>6</output>

<result>6</result>