If a circle with a diameter of 10 cm is cut into the largest square, what is the area of the square in square centimeters?
把一个直径10厘米的圆，削成一个最大的正方形，这个正方形的面积是多少平方厘米？
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 / 2</gadget>
<output>5/2 = around 2.5</output>

<gadget id="calculator">5 * (5/2) * 4</gadget>
<output>50</output>

<result>50</result>