If 3 squares with side lengths of 10 cm are put together to form a rectangle, what is the perimeter of the resulting rectangle in cm?
将3个边长是10厘米的正方形拼成一个长方形，拼成的长方形的周长是多少厘米？
<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">30 + 10</gadget>
<output>40</output>

<gadget id="calculator">40 * 2</gadget>
<output>80</output>

<result>80</result>