Uncle Yang sold 720 barrels of purified water in January. According to this calculation, how many barrels he can sell in a year.
杨叔叔一月份卖纯净水720桶，照这样计算，他全年可卖多少桶．
<gadget id="calculator">720 * 12</gadget>
<output>8_640</output>

<result>8_640</result>