Only two fish can be fried on one pan, and it takes 3 minutes to fry one fish on one side, (both sides must be fried), so how many minutes should it take to fry three fish at least?
一个平底锅上只能煎两条鱼，用它煎一条鱼一面要3分钟，(正反面都要煎)那么煎3条鱼至少需要多少分钟．
<gadget id="calculator">3 + 3 + 3</gadget>
<output>9</output>

<result>9</result>