A 25 story building has 4 apartments on each floor. If each apartment houses two people, how many people does the building house?
Let's be accurate as possible. Think before you answer.
200
If each building floor has 4 apartments, we have 25 floors * 4 apartments / floor = 100 apartments.

If each apartment has 2 people, 100 apartments * 2 people / apartment = 200 people.

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The answer: 200