A rope is cut off for the first time (2/5), and the length of the second cut is the first cut (1/4). At this time, there are still 10 meters left in the rope. What is the total length of the rope in meters? ?
一条绳子，第一次截去(2/5)，第二次截去的长度是第一次截去的(1/4)，这时绳子还剩下10米，这条绳子全长多少米？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">(2/5) * (1/4)</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">1 - (2/5) - (1/10)</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">10 / (1/2)</gadget>
<output>20</output>

<result>20</result>