#include <iostream>
#include <map>
#include <vector>
#include <algorithm>
#include <string>
#include <queue>
#include <iomanip>
#include <set>
#include <unordered_map>

#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

using namespace std;

#define rep(i,n) for(int i=0,i##_len=(n);i<i##_len;++i)
#define repx(i,s,d,e) for(int i=s,i##_end=(e);i<i##_end;i+=d)
#define rept(n) for(int ___i___=0,i##_len=(n);___i___<i##_len;++___i___)
#define repi(itr, ds) for (auto itr = ds.begin(); itr != ds.end(); itr++)
#define ALL(x) (x).begin(),(x).end()
#define SZ(x) ((int)(x).size())
#define ZERO(a) memset(a,0,sizeof(a))
#define BIT(n) (1LL<<(n))
#define UNIQUE(v) v.erase(unique(v.begin(),v.end()),v.end());
#define CEIL(x, y) (((x) + (y) - 1) / (y))

// vector
template <typename T>
istream &operator>>(istream &is, vector<T> &vec) {
    for (T &x : vec) is >> x;
    return is;
}
// pair
template <typename T, typename U>
ostream &operator<<(ostream &os, pair<T, U> &pair_var) {
    os << "(" << pair_var.first << ", " << pair_var.second << ")";
    return os;
}
// vector
template <typename T>
ostream &operator<<(ostream &os, const vector<T> &vec) {
    os << "{";
    for (int i = 0; i < vec.size(); i++) {
        os << vec[i] << (i + 1 == vec.size() ? "" : ", ");
    }
    os << "}";
    return os;
}
// map
template <typename T, typename U>
ostream &operator<<(ostream &os, map<T, U> &map_var) {
    os << "{";
    repi(itr, map_var) {
        os << *itr;
        itr++;
        if (itr != map_var.end()) os << ", ";
        itr--;
    }
    os << "}";
    return os;
}
// set
template <typename T>
ostream &operator<<(ostream &os, set<T> &set_var) {
    os << "{";
    repi(itr, set_var) {
        os << *itr;
        itr++;
        if (itr != set_var.end()) os << ", ";
        itr--;
    }
    os << "}";
    return os;
}
#define DUMPOUT cout
void dump_func() {
    DUMPOUT << endl;
}
template <class Head, class... Tail>
void dump_func(Head &&head, Tail &&... tail) {
    DUMPOUT << head;
    if (sizeof...(Tail) > 0) {
        DUMPOUT << ", ";
    }
    dump_func(std::move(tail)...);
}
#ifdef LOCAL_
#define dump(...)                                                              \
    DUMPOUT << "  " << string(#__VA_ARGS__) << ": "                            \
            << "[" << to_string(__LINE__) << ":" << __FUNCTION__ << "]"        \
            << endl                                                            \
            << "    ",                                                         \
        dump_func(__VA_ARGS__)
#else
#define dump(...)
#endif

typedef long long int lli;
typedef pair<int, int> ii;
typedef priority_queue<int, vector<int>, greater<int> > heapq;
int dx[4]={1,0,-1,0};
int dy[4]={0,1,0,-1};
struct aaa{
    aaa(){
        cin.tie(0); ios::sync_with_stdio(0); cout<<fixed<<setprecision(20);
    };
}aaaaaaa;

const lli MOD = 1000000007LL;

inline lli mod_add(lli x, lli y) {
    return (x + y) % MOD;
}

inline lli mod_mul(lli x, lli y) {
    return (x * y) % MOD;
}

inline lli mod_sub(lli x, lli y) {
    return x - y >= 0 ? (x - y) % MOD : (x - y + MOD) % MOD;
}

inline lli mod_pow(lli x, lli y) {
    lli ret = 1;
    while (y > 0) {
        if (y & 1) ret = ret * x % MOD;
        x = x * x % MOD;
        y = y >> 1;
    }
    return ret;
}

// inline lli mod_inv(lli x, lli m) { // 拡張Euclid あんまよくわかってない
//     lli b = m, u = 1, v = 0;
//     while (b) {
//         lli t = x / b;
//         x -= t * b; swap(x, b);
//         u -= t * v; swap(u, v);
//     }
//     u %= MOD;
//     if (u < 0) u += m;
//     return u;
// }


inline lli mod_inv(lli x) {
    return mod_pow(x, MOD - 2);
}

inline lli mod_div(lli x, lli y) {
    return x * mod_inv(y) % MOD;
}

#define MAX_FAC 100009
lli fac[MAX_FAC], finv[MAX_FAC];
void init_fac() {
    fac[0] = fac[1] = 1;
    finv[0] = finv[1] = 1;
    for (int i = 2; i < MAX_FAC; i++) {
        fac[i] = fac[i - 1] * i % MOD;
        finv[i] = finv[i - 1] * mod_inv(i) % MOD;
    }
}
inline lli com(int n, int k) {
    if (n < k || n < 0 || k < 0) return 0;
    return fac[n] * (finv[k] * finv[n - k] % MOD) % MOD;
}

signed main() {
    init_fac();
    int n, m; cin >> n >> m;
    vector<int> x(n); cin >> x;
    vector<int> y(m); cin >> y;

    lli sumX = 0;
    rep(i, n) {
        sumX = mod_add(sumX, mod_sub(mod_mul(x[i], i), mod_mul(x[i], n - 1 - i)));
    }
    lli sumY = 0;
    rep(i, m) {
        sumY = mod_add(sumY, mod_sub(mod_mul(y[i], i), mod_mul(y[i], m - 1 - i)));
    }

    dump(sumX, sumY);
    cout << mod_mul(sumX, sumY) << endl;
    return 0;
}


Measured memory_bytes: 2560