On Sunday, Wang Ming and his classmates went to a suburban park to have a barbecue. They bought 4 boxes of beef balls, each box contained 12 packs, and each pack contained 5 pieces. How many beef balls are there in total?
星期天，王明和同学到郊外公园烧烤，他们共买了4箱牛肉丸，每箱有12包，每包有5粒，一共有多少粒牛肉丸？
<gadget id="calculator">4 * 12 * 5</gadget>
<output>240</output>

<result>240</result>