Sam is currently 18 / 3 = <<18/3=6>>6 years old.

Sue is currently 6 / 2 = <<6/2=3>>3 years old.

In three years, Sue will be 3 + 3 = <<3+3=6>>6.

In three years, Same will be 6 + 3 = <<6+3=9>>9.

In three years, Kendra will be 18 + 3 = <<18+3=21>>21.

Their total age in three years is 6 + 9 + 21 = <<6+9+21=36>>36.

# Answer

36
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Sam is twice as old as Sue. Kendra is 3 times as old as Sam. If Kendra is currently 18, what will be their total age in 3 years?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
36
Sam is twice as old as Sue. Kendra is 3 times as old as Sam. If Kendra is currently 18, what will be their total age in 3 years?
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