A piece of iron wire is 28.82 meters long, and a length of 8.9 meters is cut off, how many meters are left?
一根铁丝长28.82米，剪下一段长8.9米，剩下多少米？
<gadget id="calculator">28.82 - 8.9</gadget>
<output>19.92</output>

<result>19.92</result>