Problem with mathamatical operations

[OOPs]

I wrote the following Program for calculating Amount and S.I. 10 times but I Keep getting incorrect negative answers

 for(x=1;x<=10;x++)
cin>>P>>T>>R;
 SI = (P*R*T)/100
cout<<SI;
A=SI+P;
cout<<A;
 }
getch();
}

[Duthomhas]

What are the P, T, and R values that give you negative SI values?

[MiiNiPaa]

And what are types of all variables?