The railway between Nanjing and Shanghai has 6 major stations (not including the start and end stations), so how many different tickets should be prepared at the stations.
南京与上海之间的铁路共设有6个大站(不包括起点和终点站)，这样车站共要准备多少种不同的车票．
<gadget id="calculator">6 + 2</gadget>
<output>8</output>

<gadget id="calculator">8 - 1</gadget>
<output>7</output>

<gadget id="calculator">8 * 7</gadget>
<output>56</output>

<result>56</result>