Doudou ate 12 pieces of watermelon (1/3), how many pieces did he eat?
12块西瓜，豆豆吃了(1/3)，吃了多少块．
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">12 * (1/3)</gadget>
<output>4</output>

<result>4</result>