A bundle of wires is 1 km long, 258 meters are used for the first time, and 342 meters are used for the second time. How many meters is this bundle of wires shorter than the original one?
一捆电线长1千米，第一次用去258米，第二次用去342米，这捆电线比原来的短了多少米
<gadget id="calculator">258 + 342</gadget>
<output>600</output>

<result>600</result>