Only two slices of bread can be placed in a pan at a time. Each slice of bread needs to be baked for 2 minutes on the first side and 1 minute on the second side. Xiaohong wants to eat 3 slices of bread early, how many minutes will she have to wait at least.
一个锅每次只能放两片面包，每片面包第一面要考2分钟，第二面要烤1分钟．小红早点要吃3片面包，至少要等多少分钟．
<gadget id="calculator">2 + 1 + 1 + 1</gadget>
<output>5</output>

<result>5</result>