Two rectangles with a length of 10 cm and a width of 5 cm are used to form a large rectangle. What is the perimeter of the formed rectangle in centimeters?
用两个长10厘米，宽5厘米的长方形拼成一个大长方形，拼成的长方形的周长是多少厘米？
<gadget id="calculator">10 + 10 + 5</gadget>
<output>25</output>

<gadget id="calculator">25 * 2</gadget>
<output>50</output>

<result>50</result>