import java.util.*; public class Main { public static void main(String[] args) { Scanner sc = new Scanner(System.in); int t = sc.nextInt(); while (t-- > 0) { double x1=sc.nextDouble(); double p1= sc.nextDouble(); double x2= sc.nextDouble(); double p2=sc.nextDouble(); double mulx1=0; double mulx2=0;

if (x1==0){ x1=1; } else { x1=x1; } if (x2==0){ x2=1; }else { x2=x2; } if (p1>0){ mulx1=x1*Math.pow(10,p1); }else { mulx1=x1*1; } if (p2>0){ mulx2=x2*Math.pow(10,p2); }else { mulx2=x2*1; } if (mulx1>mulx2) System.out.println(">"); else if (mulx1<mulx2) System.out.println("<"); else if (mulx1== mulx2) System.out.println("="); } }

}