The store shipped 48 boxes of table tennis balls, each box contains 12, 287 have been sold, how many table tennis balls are left?
商店运来48盒乒乓球，每盒有12个，已经卖出287个，还剩下多少个乒乓球？
<gadget id="calculator">12 * 48</gadget>
<output>576</output>

<gadget id="calculator">576 - 287</gadget>
<output>289</output>

<result>289</result>