Buzz has $7$7 books. Mae has $4$4 times as many books as Buzz.
How many books does Mae have?
If Iain is $30$30 years old and his son is $6$6 times younger than him, how old is Iain's son?
Dave is $15$15 years old. Luke is $45$45 years old.
National Park A covers an area of $42$42 km2 and National Park B covers an area of $6$6 km2.
How many times smaller is National Park B compared to National Park A?