A car travels 84 kilometers from place A to place B in 1.5 hours. At this speed, it takes 7.5 hours for the car to go back and forth between the two places. How many kilometers are there between places A and B?
一辆汽车从甲地开往乙地，1.5小时行驶84千米，照这样的速度，这辆汽车往返两地共用7.5小时，求甲乙两地相距多少千米？
<gadget id="calculator">84 / 1.5</gadget>
<output>56</output>

<gadget id="calculator">7.5 / 2</gadget>
<output>3.75</output>

<gadget id="calculator">56 * 3.75</gadget>
<output>210</output>

<result>210</result>