A car wheel has an outer diameter of 0.6 meters and rolls 800 times per minute. Please do the math: How many kilometers per hour can this car travel?
一辆汽车的车轮的外直径是0.6米，每分钟滚动800周．请你算一算：这辆汽车每小时能行驶多少千米？
<gadget id="calculator">60 / 1_000</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">3.14 * 0.6 * 800 * 1 * (3/50)</gadget>
<output>90.432</output>

<result>90.432</result>