[Solved] SOLVED: Four function integer calculator

Create a very simple four function integer calculator with buttons for Add, Subtract, Multiply, and Divide, and with two text-type input fields. When the user enters two numbers and clicks one of the buttons, the answer is displayed where shown.Your program must use an alert to tell the user about any errors. The possible errors include:One or both input fields are blankOne or both input fields < -9999 or greater than 9999Divide by zeroIllegal character in either input field. Only 0, 1 ,2 ,3 ,4 ,5 ,6 ,7 ,8 ,9, and are allowed.You must include instructions to the instructor onhow to install the assignment.Do this in a separate file named ReadMe.txt.Even though there are none in the example,you must include instructions to the user.