How far does a boat travel in 3 hours at 65 miles per hour

Given,

The boat travels at an speed of 65 miles per hour.

Which means, the boat is travelling 65 miles in 1 hour.

So,
Using unitary method,

In 1 hour, the boat travels 65 miles.
In 3 hour, the boat travels (65 * 3) miles.
                                      = 195 miles.

So, The boat travels 195 miles in 3 hours at 65 miles per hour.

Add the cents that add the left overs to get the first number