A rectangular aluminum plate with a length of 0.85 meters and a width of 0.6 meters; a square aluminum plate with a side length of 0.72 meters. Which one has the larger area? How many square meters is it?
一块长方形铝板，长0.85米，宽0.6米；一块正方形铝板，边长0.72米．哪一块的面积大？大多少平方米？
<gadget id="calculator">0.72 * 0.72</gadget>
<output>0.5184</output>

<gadget id="calculator">0.85 * 0.6</gadget>
<output>0.51</output>

<gadget id="calculator">0.5184 - 0.51</gadget>
<output>0.0084</output>

<result>0.0084</result>