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Bella begins to walk from her house toward her friend Ella's house. At the same time, Ella begins to ride her bicycle toward Bella's house. They each maintain a constant speed, and Ella rides 15 times as fast as Bella walks. The distance between their houses is 6 miles, (5280 feet per mile), and Bella covers 5 feet with each step. How many steps will Bella take by the time she meets Ella?

a) 398
b) 409
c) 404
d) 396

Explain