The tire diameter of a car is 6 decimeters, and the wheel rotates 500 times per minute. How many kilometers does the car travel per hour?
一辆汽车的轮胎直径是6分米，每分钟车轮转动500周，这辆汽车每时行驶多少千米？
<gadget id="calculator">6 / 10</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">60 / 1_000</gadget>
<output>3/50 = around 0.06</output>

<gadget id="calculator">3.14 * (3/5) * 500 * 1 * (3/50)</gadget>
<output>56.52</output>

<result>56.52</result>