Uncle Li went from Guangzhou to Heyuan. The speed of the car was 40 km/h. He walked for 3 hours and returned only 2 hours. How far is it from Guangzhou to Heyuan? How many kilometers per hour did you travel on average when you returned?
李叔从广州到河源，去时汽车的速度是40千米/时，走了3小时，返回只用了2小时，从广州到河源有多远？返回时平均每小时行多少千米？
<gadget id="calculator">40 * 3</gadget>
<output>120</output>

<gadget id="calculator">120 / 2</gadget>
<output>60</output>

<result>60</result>