The power supply bureau originally had a bundle of wires 18.5 meters long, but the master worker used 0.81 meters for the first time, and 2.19 meters for the second time. How many meters are the wires shorter than before?
供电局原来有捆电线长18.5米，工人师傅第一次用去0.81米，第二次又用去2.19米，这时电线比原来短了多少米？
<gadget id="calculator">0.81 + 2.19</gadget>
<output>3</output>

<result>3</result>