The radius of a car wheel is 25 cm, and the car moves forward at a speed of 1000 revolutions per minute, how many kilometers can it travel in one hour?
一辆小轿车车轮的半径是25厘米，汽车以每分钟1000转的速度前行，一小时可以前进多少千米？
<gadget id="calculator">60 / 1_000</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">2 * 0.25 * 3.14 * 1_000 * (3/50)</gadget>
<output>94.2</output>

<result>94.2</result>