Armand = (1/3) * 12 = <<(1/3)*12=4>>4 hours

Ella = 2 * 12 = <<2*12=24>>24 hours

Total hours = 12 + 4 + 24 = <<12+4+24=40>>40 hours

They worked a total of 40 hours.

# Answer

40
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Amber worked for 12 hours last weekend. Armand worked one-third as long and Ella worked twice as long. How many hours did the 3 people work in total?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
40
Amber worked for 12 hours last weekend. Armand worked one-third as long and Ella worked twice as long. How many hours did the 3 people work in total?
train