The highway between Jiangyan and Shanghai is 252 kilometers long. Two buses A and B drive from Jiangyan to Shanghai at the same time. Bus A travels 80 kilometers per hour. After 0.8 hours, the distance between the two cars is 16 kilometers. How many kilometers per hour does passenger car B travel at least?
姜堰与上海的公路长252千米，甲乙两辆大客同时从姜堰驶往上海，甲客车每小时行80千米，0.8小时后两车相距16千米．乙客车每小时至少行多少千米？
<gadget id="calculator">80 * 0.8</gadget>
<output>64</output>

<gadget id="calculator">64 - 16</gadget>
<output>48</output>

<gadget id="calculator">48 / 0.8</gadget>
<output>60</output>

<result>60</result>