I'll give you a question, please answer with step-by-step reasoning process.
James has 3 fish tanks. 1 of the tanks has 20 fish in it and the other two have twice as many fish each as the first. How many total fish do they have?

100
The second and third tank each have 20 * 2 = 40 fish.

So in total there are 20 + 40 * 2 = 100 fish.

.

So, the final answer is 100