Question

In Paris, the sculpture Long-Term, created by Armand Fernandez, contains 60 cars embedded in 3.5 million pounds of concrete. How many tons of concrete is this?

Answer 1

You'll obviously have to convert "million pounds" to "tons."
Hint:  1 ton = 2000 pounds.  Create a conversion factor from this and then multiply "3.5 million pounds" by your conversion factor (with "pounds" in the denominator of this factor).