I need help with this problem. I have no idea how to go about it! Why can't math just use numbers and not words?!

"Fern can fly her plane 240 miles against the wind in the same time it takes her to fly 360 miles with the wind. The speed of the plane in still air is 30 mph more than four times the speed of the wind. Find the speed of the plane in still air."

Fff, I meant "word problem," not "work."