Uncle Wang drove to Taicheng at a speed of 60 km/h and took 4 hours. Using 1 hour less on return, what is the speed of return?
王叔叔开车去台城，去时速度为60千米/时，用4小时．返回时少用1小时，返回的速度是多少？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">4 / 3</gadget>
<output>4/3 = around 1.333333</output>

<gadget id="calculator">60 * (4/3)</gadget>
<output>80</output>

<result>80</result>