A bamboo pole is 5 meters long, the part inserted into the water accounts for 3/5 of the total length, how long is the part above the water?
一根竹竿长5米，插入水中的部分占全长的(3/5)，露出水面的部分有多长？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">1 - (3/5)</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">5 * (2/5)</gadget>
<output>2</output>

<result>2</result>