If a square with a side length of 10 cm is divided equally into two rectangles of the same shape and size, what is the sum of the perimeters of the two rectangles in cm?
把一个边长是10厘米的正方形，平均分成两个形状和大小完全一样的长方形，这两个长方形的周长总和是多少厘米．
<gadget id="calculator">10 / 2</gadget>
<output>5</output>

<gadget id="calculator">10 + 5</gadget>
<output>15</output>

<gadget id="calculator">15 * 2 * 2</gadget>
<output>60</output>

<result>60</result>