Best estimate for the product of 2,704.241 ×165.9

Adriano loves anime and collects toys from his favorite series.each month he gains 4 toys. if adriano has 3 toys when he starts collecting, how many does he have after 4 months

[10 points, algebra 2]according to my answer key the restrictions are -1 and 4. but why not positive 1?

If olu is twice as old as funmi if the sum of their ages is 60 how old is olu