#include<bits/stdc++.h>
//#define int long long
#define endl "\n"
#define ll long long
#define PII std::pair<int,int>
using namespace std;
const int maxn = 1e5 + 5;
const int mod = 1e9 + 7;
int main() {
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
    int T; cin >> T;
    while (T--) {
        int l, r; cin >> l >> r;
        bool flag = false;
        int ans = 1;
        for (int i = l; i <= r; ++i) {
            int num = i;
            while (num) {
                int temp = num % 10;
                if (temp == 0) {
                    flag = true;
                    break;
                }
                ans = ans * temp % mod;
                num /= 10;
            }
            if (flag) break;
        }
        if (flag) cout << "0" << endl;
        else cout << ans << endl;
    }
    return 0;
}