It costs 72 yuan to subscribe to "Family Education Weekly" for half a year. How much does Li Ming need to subscribe for three quarters?
订一份《家教周刊》半年需要72元，李明想订阅三个季度共需要多少钱？
<gadget id="calculator">72 / 2</gadget>
<output>36</output>

<gadget id="calculator">36 * 3</gadget>
<output>108</output>

<result>108</result>