The diameter of the base of a cylinder is 3 cm, and the side view is a square, so what is the area of the square in square centimeters?
一个圆柱的底面直径是3cm，侧面展开图是一个正方形，那么这个正方形的面积是多少平方厘米？
<gadget id="calculator">3.14 * 3</gadget>
<output>9.42</output>

<gadget id="calculator">9.42 * 9.42</gadget>
<output>88.7364</output>

<result>88.7364</result>