A watermelon is 6 kilograms, and Xiaoming's family has eaten (4/6), how many kilograms are left?
一个西瓜6千克，小明一家人吃了(4/6)，还剩多少千克？
<gadget id="calculator">4 / 6</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 - (2/3)</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">6 * (1/3)</gadget>
<output>2</output>

<result>2</result>