Cut out the largest semicircle from a rectangle with a length of 18 cm and a width of 8 cm. What is the perimeter of the remaining figure in cm?
一张长18厘米，宽8厘米的长方形中，剪下一个最大的半圆，剩下图形的周长是多少厘米．
<gadget id="calculator">18 + 8</gadget>
<output>26</output>

<gadget id="calculator">26 * 2</gadget>
<output>52</output>

<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">3.14 * 8</gadget>
<output>25.12</output>

<gadget id="calculator">25.12 - 16</gadget>
<output>9.12</output>

<gadget id="calculator">52 + 9.12</gadget>
<output>61.12</output>

<result>61.12</result>