A bundle of wires takes up 20 meters, and the rest is 4 meters less than the original 60%. How many meters is the original bundle of wires?
一捆电线用去20米，剩下的比原来的60%少4米，这捆电线原有多少米？
<gadget id="calculator">20 + 20</gadget>
<output>40</output>

<result>40</result>