If 4 squares with an area of 1 square centimeter are formed into a rectangle, what is the area of the rectangle in square centimeters?
将4个面积为1平方厘米的正方形组成一个长方形，这个长方形的面积是多少平方厘米．
<gadget id="calculator">1 * 4</gadget>
<output>4</output>

<result>4</result>