There are 72 new schoolbags in the stationery store. They sold (1/3) on the first day, and the ratio of the number of schoolbags sold on the second day to the first day is 1:2. How many schoolbags were sold on the second day?
文具店有72个新书包，第一天卖了(1/3)，第二天卖的书包数与第一天的比为1：2，第二天卖出书包多少个？
<gadget id="calculator">1 / 3</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">72 * (1/3) * (1/2)</gadget>
<output>12</output>

<result>12</result>