Cut the largest semicircle out of a piece of rectangular paper with a length of 6cm and a width of 4cm. What is the circumference of this semicircle in cm?
在一块长6cm，宽4cm的长方形纸中剪一个最大的半圆，这个半圆的周长是多少cm
<gadget id="calculator">6 / 2</gadget>
<output>3</output>

<gadget id="calculator">3.14 * 3</gadget>
<output>9.42</output>

<gadget id="calculator">9.42 + 6</gadget>
<output>15.42</output>

<result>15.42</result>