Consider the question. 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?
 What is the step-by-step reasoning process to arrive at the answer: 40?

Show your work and conclude with the exact phrasing "Therefore, the final answer is [answer]." where [answer] is just the final number or expression that solves the problem.
user
Armand = (1 / 3) * 12 = 4 hours. Ella = 2 * 12 = 24 hours. Total hours = 12 + 4 + 24 = 40 hours. They worked a total of 40 hours.