The fruit wholesale market shipped 5 carloads of apples, each with 269 boxes, and sold a total of 508 boxes in 4 days. How many boxes are left?
水果批发市场运来5车苹果，每车269箱，4天共卖出508箱，还剩多少箱？
<gadget id="calculator">269 * 5</gadget>
<output>1_345</output>

<gadget id="calculator">1_345 - 508</gadget>
<output>837</output>

<result>837</result>