JavaScript program to calculate parallelogram area

Fallowing program shows you how to calculate parallelogram area.
This program gets parallelogram base and height from user and calculates area and prints it using following formula
Area = base X height

var parallelogramBase = parseInt(prompt("Please enter base of parallelogram:"));
var parallelogramHeight = parseInt(prompt("Please enter height of parallelogram:"));
var areaOfParallelogram = parallelogramBase * parallelogramHeight;
console.log("Area of parallelogram is: " + areaOfParallelogram);

Output:

Please enter base of parallelogram: 
7
Please enter height of parallelogram: 
9
Area of parallelogram is: 63.0