box of candies weighs 500 grams in total. After eating (1/3) of the candies, the remaining candies weigh 350 grams. How many grams does the empty box weigh?
一盒糖连盒共重500克，吃掉糖的(1/3)后，余下的糖连盒重350克，空盒重多少克？
<gadget id="calculator">500 - 350</gadget>
<output>150</output>

<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">150 / (1/3)</gadget>
<output>450</output>

<gadget id="calculator">500 - 450</gadget>
<output>50</output>

<result>50</result>