For a colored ribbon, the full length (2/5) is used for the first time, and 14 meters is used for the second time. At this time, the remaining length of the colored ribbon is just used (1/3). How long is this ribbon originally?
一根彩带，第一次用去全长的(2/5)，第二次用去14米，这时剩下的彩带长度正好是用去的(1/3)．这根彩带原来长多少米？
<gadget id="calculator">1 + 3</gadget>
<output>4</output>

<gadget id="calculator">3 / 4</gadget>
<output>3/4 = around 0.75</output>

<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">(3/4) - (2/5)</gadget>
<output>7/20 = around 0.35</output>

<gadget id="calculator">14 / (7/20)</gadget>
<output>40</output>

<result>40</result>