The distance between A and B is 180 kilometers. It takes 3.6 hours for a motorcycle to complete the journey. The speed ratio of a car and this motorcycle is 4:5. If these two cars drive oppositely from places A and B at the same time, how many hours later will they meet on the way?
甲乙两地相距180千米，一辆摩托车行完全程要3.6小时，一辆汽车与这辆摩托车的速度比是4：5．如果这两辆车同时从甲乙两地相对开出，几小时后在途中相遇？
<gadget id="calculator">180 / 3.6</gadget>
<output>50</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">50 * (4/5)</gadget>
<output>40</output>

<gadget id="calculator">50 + 40</gadget>
<output>90</output>

<gadget id="calculator">180 / 90</gadget>
<output>2</output>

<result>2</result>