Fry sesame cakes on both sides, fry the first side for 2 minutes, fry the second side for only 1 minute, fry a sesame cake for 3 minutes, a frying pan can put 2 sesame cakes at a time, if you want to fry 3 sesame cakes, how many minutes is the most time-saving.
煎芝麻饼要两面煎，煎第一面要2分钟，煎第二面只要1分钟就行了，煎一只芝麻饼要3分钟，一只煎锅一次能放入2个芝麻饼，如果要煎3个芝麻饼，需要多少分钟最省时．
<gadget id="calculator">2 + 1 + 1 + 1</gadget>
<output>5</output>

<result>5</result>