Use two squares with an area of 25 square centimeters to form a rectangle, and then cut a largest semicircle from this rectangle. What is the area of the cut semicircle in square centimeters?
用两个面积为25平方厘米的正方形拼接成一个长方形，然后从这个长方形中剪一个最大的半圆．求剪成的半圆的面积是多少平方厘米？
<gadget id="calculator">25 / 2</gadget>
<output>25/2 = around 12.5</output>

<gadget id="calculator">3.14 * (25/2)</gadget>
<output>39.25</output>

<result>39.25</result>