The store shipped 520 barrels of oil, sold 362 barrels on the first day, and shipped 168 barrels in the next day. How many barrels of oil did the store have at this time?
商店运来520桶油，第一天卖出362桶，第二天又运进168桶，这时商店有多少桶油？
<gadget id="calculator">520 - 362</gadget>
<output>158</output>

<gadget id="calculator">158 + 168</gadget>
<output>326</output>

<result>326</result>