Dig a canal. On a map with a scale of (1/300), measure the canal to be 40 centimeters long. How many meters is the canal actually long?
挖一条水渠，在比例尺是(1/300)的地图上，量得这条水渠长40厘米，这条水渠实际长多少米？
<gadget id="calculator">1 / 300</gadget>
<output>1/300 = around 0.003333</output>

<gadget id="calculator">40 / (1/300)</gadget>
<output>12_000</output>

<gadget id="calculator">12_000 / 100</gadget>
<output>120</output>

<result>120</result>