#include <bits/stdc++.h>

using namespace std;

void test_case(int tc){
    int x, y, xZeroes, yZeroes;
    cin >> x >> xZeroes >> y >> yZeroes;

    int xLength = log10(x) + 1 + xZeroes;
    int yLength = log10(y) + 1 + yZeroes;

    if(xLength > yLength){
        cout << ">\n";
        return;
    } else if(xLength < yLength){
        cout << "<\n";
        return;
    }

    int minZeroes = min(xZeroes, yZeroes);
    xZeroes -= minZeroes;
    yZeroes -= minZeroes;

    double dx, dy;

    if(x > y){
        dx = (double)x / pow(10, yZeroes);
        dy = y;
    } else{
        dx = x;
        dy = (double)y / pow(10, xZeroes);
    }

    if(dx > dy){
        cout << ">";
    } else if(dx < dy){
        cout << "<";
    } else{
        cout << "=";
    } cout << "\n";

    return;
}



int main(){
    ios::sync_with_stdio(0);
    cin.tie(0);

    int t;
    cin >> t;

    for(int tc = 1; tc <= t; ++tc){
        test_case(tc);
    }

    cout << flush;

    return 0;
}