There are 3 grams of fiber in 1/2 cup of oatmeal. Therefore, the number of grams of fiber in 1 (which is twice as large as 1/2) cup of oatmeal is: 3 g fiber *2= 6 g fiber.
There is 6 g fiber in 1 cup of oatmeal. Therefore, the number of fiber in 1 1/8 (which is 1 1/8 times as large as 1) cups of oatmeal is: 6 g fiber *(1 1/8)= 6.75 g fiber.
I am not sure if I am correct. I think that the angles did not help to solve the problem, ( it makes an obtuse angle) and the unit rate is 421 mph and 384 mph.
2*421+384*2= 1610 miles or 2 (421+384)= 1610 miles