An ISBN-10 (International Standard Book Number) consists of 10 digits: d₁d₂d₃d₄d₅d₆d₇d₈d₉d₁₀. The last digit, d₁₀, is a checksum, which is calculated from the other nine digits using the following formula:

(d₁ ? 1 + d₂ ? 2 + d₃ ? 3 + d₄ ? 4 + d₅ ? 5 + d₆ ? 6 + d₇ ? 7 + d₈ ? 8 + d₉ ? 9) % 11

If the checksum is 10, the last digit is denoted as X according to the ISBN-10 convention. Write a program that prompts the user to enter the first 9 digits and displays the 10-digit ISBN (including leading zeros). Your program should read the input as an integer. Here are sample runs:

Enter the first 9 digits of an ISBN as integer: 013601267 - The ISBN-10 number is 0136012671 Enter the first 9 digits of an ISBN as integer: 013031997 The ISBN-10 number is 013031997X