import java.io.*;
class segitiga {
public static void main(String args[]) {
float a=0,t=0,l=0;
try {
BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
System.out.print(”Alas : “);
a = Float.parseFloat(br.readLine());
System.out.print(”Tinggi : “);
t = Float.parseFloat(br.readLine());
}
catch (Exception e) {
e.printStackTrace();
}
l = (a * t) /2;
System.out.println(”Luas : ” + l);
}
}