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 $5$ times as fast as Bella walks. The distance between their houses is $2$ miles, which is $10,560$ feet, and Bella covers $2 \tfrac{1}{2}$ feet with each step. How many steps will Bella take by the time she meets Ella?

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Written solution:

Since for every foot Bella walks, Ella rides 5 feet, we know that Bella will walk $\frac16$ of the distance between the two houses, and so she walks $$\dfrac16 \cdot 10560=1760$$ feet. Since she walks $2.5$ feet per step, she takes $$\dfrac{1760}{2.5} = 704$$ steps by the time she meets Ella.

Thus, A is the correct answer.