On a plan with a scale of 1:100, the side length of a square is measured as 3 cm. What is the actual area of the square in square meters?
在一幅比例尺是1：100的平面图上，量得一个正方形的边长是3厘米，这个正方形的实际面积是多少平方米
<gadget id="calculator">1 / 100</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">3 / (1/100) / 100</gadget>
<output>3</output>

<gadget id="calculator">3 * 3</gadget>
<output>9</output>

<result>9</result>