A rope is 28.82 meters long, and 18.9 meters are cut off. How much less is the remaining length than the cut one?
一根绳子长28.82米，剪下18.9米，剩下的比剪下的少多少米．
<gadget id="calculator">28.82 - 18.9</gadget>
<output>9.92</output>

<gadget id="calculator">18.9 - 9.92</gadget>
<output>8.98</output>

<result>8.98</result>