A wire is 100 meters long, 28.45 meters are used for the first time, and 26.55 meters are used for the second time. How many meters is left on this wire?
一根铁丝长为100米，第一次用去28.45米，第二次用去26.55米．这根铁丝还剩多少米？
<gadget id="calculator">28.45 + 26.55</gadget>
<output>55</output>

<gadget id="calculator">100 - 55</gadget>
<output>45</output>

<result>45</result>