A train departs from Hefei at 7:30 am at a speed of 80 kilometers per hour and arrives in Hangzhou at 3:30 pm that day. How many kilometers is the distance between Hefei and Hangzhou?
一列火车上午7：30以每小时80千米的速度从合肥出发，当天下午3：30到达杭州，问合肥到杭州相距多少千米？
<gadget id="calculator">8 * 80</gadget>
<output>640</output>

<result>640</result>