To get the number of miles traveled, we multiply the speed in miles
per hour times the number of hours.

As a specific example, to get the idea: 

to find the number of miles traveled in 3 hours
you would multiply the speed 65 by 3 hours and get 195 miles.

So in general:

to find the number of miles, m, traveled in h hours
you would multiply the speed 65 by h hours and get the m miles.

So the equation is

miles = speed times hours

or

m = 65h

where m is the number of miles and h is the number of hours.

Edwin