A bag of 500g of salt, I ate (1/4) in the first week, and the rest (1/3) in the second week, how many grams of salt are left in this bag.
一袋盐500g，第一周吃了(1/4)，第二周吃了余下的(1/3)，这袋盐还剩多少g．
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">1 - (1/4)</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">500 * (3/4)</gadget>
<output>375</output>

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

<gadget id="calculator">1 - (1/3)</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">375 * (2/3)</gadget>
<output>250</output>

<result>250</result>