title: Calculate Kilometers on graph
body: <p>I have this following assignment:
  "The program will read from the user the Landmarks (X,Y) of the flight destination, which is 2 round numbers. the program will calculate the flight distance assuming the starting position is (0,0). the flight price is calculated by distance - every 100km (or less) cost 50$ (Constant number). the program output will be the ticket price".</p>
  
  <p>Example: "Hello, please enter your destination in two integers: 
  350 2471 
  The price of the flight is: 
  1250 ".</p>
  
  <p>How did they get to this price?
  its writting that the user has entered (350, 2471). and the distance between 0,0 to 350,2471 is 2495.66 km.
  how did they get this number?</p>