A circle is exactly cut into two congruent semicircles. The sum of the circumferences of the two semicircles is 4 cm longer than the original circumference. What is the circumference of the original circle in cm? (π takes 3.14)
一个圆正好切成两个全等的半圆，这两个半圆的周长的和比原来圆周长增加了4厘米，原来圆的周长是多少厘米．(π取3.14)
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">3.14 * 2</gadget>
<output>6.28</output>

<result>6.28</result>