A box of candy weighs 500 grams in total. If you eat (2/5) of this box of candy, the remaining box weighs 340 grams. How many grams does the original candy weigh?
一盒糖，连盒共重500克，如果吃了这盒糖的(2/5)，剩下的连盒重340克，原来糖重多少克？
<gadget id="calculator">500 - 340</gadget>
<output>160</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">160 / (2/5)</gadget>
<output>400</output>

<result>400</result>