A rope is 46 meters long, 12.5 meters are used for the first time, and 23.6 meters are used for the second time, how many meters is the rope shorter than before?
一根绳子长46米，第一次用去12.5米，第二次用去23.6米，这时绳子比原来短了多少米？
<gadget id="calculator">12.5 + 23.6</gadget>
<output>36.1</output>

<result>36.1</result>