Two cars, A and B, drive from two places 135 kilometers apart at the same time. Car A travels 48 kilometers per hour, and car B travels 42 meters per hour. How many kilometers did car B travel when they met?
甲乙两辆汽车同时从相距135公里的两地相对开出，甲汽车每小时行48千米，乙汽车每小时行42于米．相遇时乙汽车行多少千米？
<gadget id="calculator">48 + 42</gadget>
<output>90</output>

<gadget id="calculator">135 / 90</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) * 42</gadget>
<output>63</output>

<result>63</result>