Which method is more reasonable for mathematical wide-angle optimization? I want to bake four cake houses, and I will find one soldier and six soldiers.

Pancake method is more reasonable for mathematical wide-angle optimization. It's time to bake four pancake houses. 1 Cook 2 cakes first. Bake 1 for three to three minutes, then take out 1, put in a new one, bake for another three minutes, where 1 is ready, then take out 1 and bake for another three minutes, one ***9 minutes. Number of cake blocks × time to turn each side = the shortest time required.

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[Teaching] You must look at the typical material analysis questions before the exam! Finished, up, up, up 42 points!