Why isn't my if statement working?

I was working on a calculator that can operate in C. Suddenly, an error popped up saying it was expecting an expression. I wonder why the if statement isn't working. Here is the code that I typed in!

#include <stdio.h>

int main(int argc, const char * argv[]) {

    int symbol;
    int numberOne;
    int numberTwo;

    printf("+,-,/,*?");
    symbol = scanf("%d", &symbol);

    if (symbol==*)
    {
        printf("Please enter first number.");
        numberOne = scanf("%d", &numberOne);
        printf("%d %d = ?" , numberOne , symbol);
    }
    return 0;
}

It said that there was an error on the if statement. Please report my error. :D