Use 4 squares with a side length of 8 cm to form a large square. What is the perimeter of this large square in cm?
用4块边长是8厘米的正方形，拼成一个大正方形，这个大正方形的周长是多少厘米？
<gadget id="calculator">8 * 2</gadget>
<output>16</output>

<gadget id="calculator">16 * 4</gadget>
<output>64</output>

<result>64</result>