#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
int main() {
 ios::sync_with_stdio(false);
 cin.tie(0),cout.tie(0);
    ll n;
    cin>>n;
    while(n--)
    {
        ll l,r;
        ll flag=1;
        cin>>l>>r;
        if(r-l>=10)
        flag=0;
        else{
        for(;l<=r;l++)
        {
            ll tt=l;
            while(tt>1)
            {
                flag=flag*(tt%10);
                flag%=1000000007;
                tt/=10;
            }
        }
    }
        cout<<flag%1000000007<<endl;
    }
    return 0;
}