A square has a diagonal of 16 centimeters, what is the area of the square in square centimetres?
一个正方形，它的对角线长16厘米，这个正方形的面积是多少平方厘米．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">16 * 8</gadget>
<output>128</output>

<result>128</result>