You are given a math word problem and you are supposed to apply multiplication or division mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

While playing a trivia game , Adam answered 5 questions correct in the first half and 5 questions correct in the second half . If each question was worth 5 points , what was his final score ?
50

My car gets 20 miles per gallon of gas . How many miles can I drive on 5 gallons of gas ?
100

Mike had 15 video games but 9 of them were n't working . If he wanted to sell the working games for $ 5 each , how much money could he earn ?
30