I cant pass all test cases [closed]

Im new to coding and in the given code where I have to get the factorial of a number as output.I could get output for some numbers but numbers with 3 digits like 120,879 etc there no output i.e output is zero.It is going out of loop.Can I know the mistake I made.Hope to get a replt.Thank youThis image is the screenshot of the program I have written and beside the left side shows all test cases couldnt pass