Keanu's motorcycle can store 8 liters of gasoline. If his destination is 280 miles away and his motorcycle consumes 8 liters of gasoline per 40 miles, how many times does Keanu have to refill his motorcycle with gasoline if he will make a round trip?
The total number of miles for a round trip is 280 x 2= <<280*2=560>>560.
Therefore, he needs to refill his motorcycle 560/40 = <<560/40=14>>14 times.
#### 14