A wire is 89 meters long, 28 meters are used for the first time, and 30 meters are used for the second time, how many meters is the length of the wire now shorter than before?
一根铁丝长89米，第一次用去28米，第二次用去30米，现在铁丝的长度比原来短了多少米．
<gadget id="calculator">28 + 30</gadget>
<output>58</output>

<result>58</result>