The circumference of a circular cylinder mouth is 125.6 cm. Now I want to make a cylinder head for the cylinder. The diameter of the cylinder head is 10 cm larger than the diameter of the cylinder mouth. If the cylinder head is equally divided into two parts, what is the circumference of each cylinder head?
一圆形缸口的周长为125.6厘米，现想为缸做缸盖，缸盖的直径比缸口直径多10厘米．如果把缸盖平均分成两份，每一块缸盖的周长是多少？
<gadget id="calculator">125.6 / 3.14</gadget>
<output>40</output>

<gadget id="calculator">40 + 10</gadget>
<output>50</output>

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

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<gadget id="calculator">78.5 + 50</gadget>
<output>128.5</output>

<result>128.5</result>