Without using any string or array methods, write a method that returns the product of the first and last digits of the positive integer parameter. For example, if the parameter is 5218, return 40 since 5*8=40. If the parameter is a single-digit number, that digit will be considered BOTH the first AND last digit. For example, with the parameter 7, you would return 49 since 7*7=49 and 7 would be considered both the first and last digit.