The outer diameter of a car tire is 1 meter. If it rotates 5 times per second on average, how many seconds does it take for the car to pass a 157-meter-long bridge?
一辆汽车轮胎的外直径是1米，如果平均每秒转5圈，那么这辆汽车通过一座长157米的大桥，需要多少秒？
<gadget id="calculator">3.14 * 1 * 5</gadget>
<output>15.7</output>

<gadget id="calculator">157 / 15.7</gadget>
<output>10</output>

<result>10</result>