The outer diameter of a car tire is about 1.3 meters. If it rotates 100 times per minute on average, how many minutes does it take to pass a bridge with a length of 816.4 meters?
一辆汽车轮胎的外直径约是1.3米，如果平均每分钟转100周，通过一座长816.4米的大桥，需要几分钟？
<gadget id="calculator">3.14 * 1.3</gadget>
<output>4.082</output>

<gadget id="calculator">4.082 * 100</gadget>
<output>408.2</output>

<gadget id="calculator">816.4 / 408.2</gadget>
<output>2</output>

<result>2</result>