Simple calculator Please write a simple calculator that takes in an equation and outputs its result Input: a string that consists of numbers, operators (only"+" and ") and spaces. Each number is a non-negative integer. The final result or any intermediate results will be between 0 and 1,000,000. There are no parentheses, no minus signs Output: a number that is the result of equation Sample input +142+5+0*9 Sample output 36