The earth circumference of a circle with the radius is $\"\"$ million miles.

Find the distance the earth travels in one day in its path arround the sun.

Circumference is $\"\"$ .

Substitute $\"\"$ in $\"\"$ .

$\"\"$

The earth travel $\"\"$ of this distance in a day

$\"\"$

The earth travels $\"\"$ million miles/day.

Just replace by $\"\"$