On a map with a scale of 1:5,000,000, the distance between Hangzhou and Shanghai is 3 cm. A truck and a bus depart from Hangzhou and Shanghai respectively at the same time. After 1.25 hours, they meet on the way. The speed of the truck is known. It's a bus (9/11). How many kilometers per hour does the bus travel on average?
在比例尺是1：5000000的地图上，量得杭州到上海的距离是3厘米，一辆货车和一辆客车分别从杭州和上海同时相对开出，经过1.25小时在途中相遇，已知货车的速度是客车的(9/11)．客车平均每小时行多少千米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">3 / (1/5_000_000) / 100_000 / 1.25</gadget>
<output>120</output>

<gadget id="calculator">9 + 11</gadget>
<output>20</output>

<gadget id="calculator">11 / 20</gadget>
<output>11/20 = around 0.55</output>

<gadget id="calculator">120 * (11/20)</gadget>
<output>66</output>

<result>66</result>