A butterfly flies at a speed of 500 m/min, how many kilometers does it fly in 2 hours?
蝴蝶飞行的速度是500米/分钟，它2小时飞行多少千米．
<gadget id="calculator">2 * 60</gadget>
<output>120</output>

<gadget id="calculator">500 * 120</gadget>
<output>60_000</output>

<gadget id="calculator">60_000 / 1_000</gadget>
<output>60</output>

<result>60</result>