Uncle Zhang traveled from Qingdao to Hangzhou. He set off by train at 7:00 in the morning and traveled 240 kilometers by 9:00. At this speed, he will arrive in Hangzhou at 2 pm. How many kilometers is the distance from Qingdao to Hangzhou?
张叔叔从青岛到杭州去旅游，早晨7：00坐火车出发，到9：00行驶了240千米．照这样的速度，他下午2时到达杭州，青岛到杭州的距离是多少千米？
<gadget id="calculator">240 / 2</gadget>
<output>120</output>

<gadget id="calculator">120 * 7</gadget>
<output>840</output>

<result>840</result>