Xiaohua originally planned to use 3 decimeters and 2 centimeters of wire to form a square. Now, he changed the plan and surrounded the wire into a rectangle with a length of 10 cm. Which of the two shapes has a larger area? How many square centimeters larger?
小华原打算用3分米2厘米的铁丝围成一个正方形．现在，他改变了计划，把这根铁丝围成一个长是10厘米的长方形，两种形状的图形哪种面积大？大多少平方厘米？
<result>4</result>