If a circle with a diameter of 5 cm is divided into two equal semicircles, what is the sum of the circumferences of the two semicircles?
把一个直径是5厘米的圆分成两个相等的半圆，这两个半圆的周长和是多少
<gadget id="calculator">3.14 * 5</gadget>
<output>15.7</output>

<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">15.7 + 10</gadget>
<output>25.7</output>

<result>25.7</result>