Use 4 small squares with a side length of 1 cm to form any non-overlapping figure. What is the area in square centimeters?
用4个边长1厘米的小正方形摆成任意无重叠的图形，面积都是多少平方厘米．
<gadget id="calculator">1 * 1 * 4</gadget>
<output>4</output>

<result>4</result>