You're confusing yourself with a lot of extra work.
Find the distance that the Earth travels in one day in its path around the Sun. Assume that a year
has 365 days and that the path of the Earth around the Sun is a circle of radius 93 million miles.
The circumference of a circle with radius is: .
The circumference of the circular orbit of the Earth is: . miles.
The Earth travels that distance in one year (365 days).
In one day, it travels: . miles.