There is a circle. Two ants start at the same time from the two ends of the diameter, A and C, and walk towards each other around the circle. They meet for the first time at point B, which is 8 centimeters away from point A, and for the second time, they meet at point B, which is 6 centimeters away from point C. At point D at centimeters, what is the circumference of this New Year's Day in centimeters?
有一个圆，两只蚂蚁分别从直径的两端A与C同时出发，绕圆周相向而行，它们第一次相遇在离A点8厘米处的B点，第二次相遇在离C点6厘米处的D点，这个元旦周长是多少厘米．
<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<gadget id="calculator">24 - 6</gadget>
<output>18</output>

<gadget id="calculator">18 * 2</gadget>
<output>36</output>

<result>36</result>