program to add 3 values and add 16% value added tax

im supposed to create a c++ program that adds three values together and adds 16% value added tax and it displays the heading "The total price is"

#include <iostream>
#include <cmath.h>

using namespace std:

int main()
{
to be honest with all of you here i am a rookie at all of this im being introduced to c++ for the first time and i need some help with it
please help
There's a tutorial here at cplusplus: http://www.cplusplus.com/doc/tutorial/ It isn't updated since C++14 was introduced.

A good online tutorial that is updated frequently: https://www.learncpp.com/
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