Sound travels 340 meters per second in the air, how many kilometers can it travel per minute?
声音在空气中每秒传播340米，每分钟能传播多少千米？
<gadget id="calculator">1 / 60</gadget>
<output>1/60 = around 0.016667</output>

<gadget id="calculator">0.34 / (1/60)</gadget>
<output>20.4</output>

<result>20.4</result>