The training base bought back 12 boxes of table tennis balls, 28 in each box, and 276 leather balls. How many more table tennis balls than leather balls?
训练基地买回12箱乒乓球，每箱28个，又买回276个皮球，乒乓球比皮球多多少个？
<gadget id="calculator">28 * 12</gadget>
<output>336</output>

<gadget id="calculator">336 - 276</gadget>
<output>60</output>

<result>60</result>