Qtcreator won't calculate correctly

[thefatladysingsopera]

I have the following console program on qtcreator 4.7.

#include <iostream>
#include <cstdlib>
using namespace std;
 
int main()
{
    int a;
    int b;
    int result = a * b;
 
cout<<"Enter a";
cin>>a;
 
cout<<"Enter b";
cin>>b;
 
cout<<"You entered"<<a<<"and you entered"<<b<<"Their product is"<<result<<endl;
cout << "Press any key to exit..." << endl;
system ("pause");
    return 0;
}

#include <iostream>
#include <cstdlib>
using namespace std;

int main()
{
    int a;
    int b;
    int result = a * b;

cout<<"Enter a";
cin>>a;

cout<<"Enter b";
cin>>b;

cout<<"You entered"<<a<<"and you entered"<<b<<"Their product is"<<result<<endl;
cout << "Press any key to exit..." << endl;
system ("pause");
    return 0;
}

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When i input 5 and 9,i get You entered5and you entered9Their product is-2009147472

why am i not getting 45?.