Regular = 2 * 14 = <<2*14=28>>28 pieces

Double = 3 * 12 = <<3*12=36>>36 pieces

28 + 36 = <<28+36=64>>64 pieces

64 pieces of bread are needed for those sandwiches.

# Answer

64
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Two pieces of bread are needed for one regular sandwich. 3 pieces of bread are needed for a double meat sandwich. How many pieces of bread are needed for 14 regular sandwiches and 12 double meat sandwiches?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
64
Two pieces of bread are needed for one regular sandwich. 3 pieces of bread are needed for a double meat sandwich. How many pieces of bread are needed for 14 regular sandwiches and 12 double meat sandwiches?
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