From Guangzhou to Shantou, the Guangmei-Shantou Railway passes through 10 railway stations. In order to meet the requirements of passengers, the railway company must prepare at least how many different train tickets for this railway line.
广梅汕铁路从广州到汕头，途中还要经过10个火车站．为了满足旅客的要求，铁路公司至少要为这条铁路线准备多少种不同的火车票．
<gadget id="calculator">12 - 1</gadget>
<output>11</output>

<gadget id="calculator">12 * 11</gadget>
<output>132</output>

<result>132</result>