A bundle of wires is 100 meters long. The first time (1/4) of the full length is used, and the second time (2/5). How many meters are used for the second time?
一捆电线长100米，第一次用去全长的(1/4)，第二次用去(2/5)，二次共用去多少米？
<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

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

<gadget id="calculator">(1/4) + (2/5)</gadget>
<output>13/20 = around 0.65</output>

<gadget id="calculator">100 * (13/20)</gadget>
<output>65</output>

<result>65</result>