#include <iostream>
#include <cmath>
#include <cstdio>
using namespace std;
#define mod 1000000007
int main()
{
    int T;
    __int64 num;
    scanf("%d",&T);
    while(T--)
    {
        __int64 n, s = 0;
        scanf("%I64d",&n);
        for(__int64 i = 1; i <= n; i++)
        {
            scanf("%I64d",&num);
            //s += (((n - i + 1)%mod) * (i%mod) * (num%mod))%mod;
            __int64 x = (n - i + 1) * i;
            x %= mod;
            x = x * num;
            x %= mod; 
            s += x;
            s %= mod;
        }
        printf("%I64d\n",s);    
    } 
    return 0;
}