car drives from place A to place B. It travels a total of 120 kilometers in the first 2 hours, and an average of 55 kilometers per hour in the next 3 hours. How many kilometers per hour does the car travel on average?
一辆汽车从甲地开往乙地，前2小时共行120千米，后3小时平均每小时行55千米，这辆汽车平均每小时行多少千米？
<gadget id="calculator">55 * 3</gadget>
<output>165</output>

<gadget id="calculator">120 + 165</gadget>
<output>285</output>

<gadget id="calculator">3 + 2</gadget>
<output>5</output>

<gadget id="calculator">285 / 5</gadget>
<output>57</output>

<result>57</result>