A rope is 5 meters long, cut (3/10) of it for the first time, and (1/5) meter for the second time, how many meters is the rope shorter than the original?
一根绳子长5米，第一次剪去它的(3/10)，第二次剪去(1/5)米，这时绳子比原来短了多少米？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">5 * (3/10)</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">(3/2) + (1/5)</gadget>
<output>17/10 = around 1.7</output>

<result>17/10 = around 1.7</result>