A wire is 1000 meters long, first 156 meters are used, and then 295 meters are used. How many meters is this wire shorter than the original?
一根电线长1000米，先用去156米，又用去295米，这根电线比原来短了多少米？
<gadget id="calculator">156 + 295</gadget>
<output>451</output>

<result>451</result>