Xiao Ming and Xiao Qiang are walking around a circular pool with a diameter of 80 meters from the same place in opposite directions at the same time. Xiao Ming walks 30.8 meters per minute, and Xiao Qiang walks 32 meters per minute. How many minutes do they meet?
小明和小强在一个直径80米的圆形水池边，从同一地点向相反方向同时绕水池行走，小明每分钟走30.8米，小强每分钟走32米，几分钟两人相遇？
<gadget id="calculator">30.8 + 32</gadget>
<output>62.8</output>

<gadget id="calculator">80 / 62.8</gadget>
<output>1.273885</output>

<gadget id="calculator">3.14 * 1.273885</gadget>
<output>3.999999</output>

<result>3.999999</result>