It takes 2 minutes to cook one cake, and at most two cakes can be cooked at a time, so how many minutes is the minimum time required to cook three cakes.
煎一张饼需要2分钟，每次最多只能煎两张饼，那么煎三张饼最少需要多少分钟．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 * 3</gadget>
<output>3</output>

<result>3</result>