There are 8 stations on the railway line from A to B, how many different fares do you need to set?
甲地到乙地的铁路线共有8个车站，需要制定多少仲不同的票价？
<gadget id="calculator">8 - 1</gadget>
<output>7</output>

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

<result>56</result>