// need
#include <iostream>
#include <algorithm>
// data structure
#include <bitset>
#include <map>
#include <queue>
#include <set>
#include <stack>
#include <string>
#include <utility>
#include <vector>
#include <complex>
//#include <deque>
#include <valarray>
#include <unordered_map>
#include <unordered_set>
#include <array>
// etc
#include <cassert>
#include <cmath>
#include <functional>
#include <iomanip>
#include <chrono>
#include <random>
#include <numeric>

// input
#define INIT std::ios::sync_with_stdio(false);std::cin.tie(0);
#define VAR(type, ...)type __VA_ARGS__;MACRO_VAR_Scan(__VA_ARGS__);
template<typename T> void MACRO_VAR_Scan(T& t) { std::cin >> t; }
template<typename First, typename...Rest>void MACRO_VAR_Scan(First& first, Rest& ...rest) { std::cin >> first; MACRO_VAR_Scan(rest...); }
#define VEC_ROW(type, n, ...)std::vector<type> __VA_ARGS__;MACRO_VEC_ROW_Init(n, __VA_ARGS__); for(int w_=0; w_<n; ++w_){MACRO_VEC_ROW_Scan(w_, __VA_ARGS__);}
template<typename T> void MACRO_VEC_ROW_Init(int n, T& t) { t.resize(n); }
template<typename First, typename...Rest>void MACRO_VEC_ROW_Init(int n, First& first, Rest& ...rest) { first.resize(n); MACRO_VEC_ROW_Init(n, rest...); }
template<typename T> void MACRO_VEC_ROW_Scan(int p, T& t) { std::cin >> t[p]; }
template<typename First, typename...Rest>void MACRO_VEC_ROW_Scan(int p, First& first, Rest& ...rest) { std::cin >> first[p]; MACRO_VEC_ROW_Scan(p, rest...); }
#define VEC(type, c, n) std::vector<type> c(n);for(auto& i:c)std::cin>>i;
#define MAT(type, c, m, n) std::vector<std::vector<type>> c(m, std::vector<type>(n));for(auto& R:c)for(auto& w:R)std::cin>>w;
// output
#define OUT(dist) std::cout<<(dist);
#define FOUT(n, dist) std::cout<<std::fixed<<std::setprecision(n)<<(dist);
#define SOUT(n, c, dist) std::cout<<std::setw(n)<<std::setfill(c)<<(dist);
#define SP std::cout<<" ";
#define TAB std::cout<<"\t";
#define BR std::cout<<"\n";
#define SPBR(w, n) std::cout<<(w + 1 == n ? '\n' : ' ');
#define ENDL std::cout<<std::endl;
#define FLUSH std::cout<<std::flush;
#define SHOW(dist) {std::cerr << #dist << "\t:" << (dist) << "\n";}
#define SHOWVECTOR(v) {std::cerr << #v << "\t:";for(const auto& xxx : v){std::cerr << xxx << " ";}std::cerr << "\n";}
#define SHOWVECTOR2(v) {std::cerr << #v << "\t:\n";for(const auto& xxx : v){for(const auto& yyy : xxx){std::cerr << yyy << " ";}std::cerr << "\n";}}
#define SHOWQUEUE(a) {auto tmp(a);std::cerr << #a << "\t:";while(!tmp.empty()){std::cerr << tmp.front() << " ";tmp.pop();}std::cerr << "\n";}
#define SHOWSTACK(a) {auto tmp(a);std::cerr << #a << "\t:";while(!tmp.empty()){std::cerr << tmp.top() << " ";tmp.pop();}std::cerr << "\n";}
// utility
#define ALL(a) (a).begin(),(a).end()
#define FOR(w, a, n) for(int w=(a);w<(n);++w)
#define RFOR(w, a, n) for(int w=(n)-1;w>=(a);--w)
#define REP(w, n) for(int w=0;w<int(n);++w)
#define RREP(w, n) for(int w=int(n)-1;w>=0;--w)
#define IN(a, x, b) (a<=x && x<b)
template<class T> inline T CHMAX(T& a, const T b) { return a = (a < b) ? b : a; }
template<class T> inline T CHMIN(T& a, const T b) { return a = (a > b) ? b : a; }
// test
template<class T> using V = std::vector<T>;
template<class T> using VV = V<V<T>>;

template<typename S, typename T>
std::ostream& operator<<(std::ostream& os, std::pair<S, T> p) {
	os << "(" << p.first << ", " << p.second << ")"; return os;
}

#define random_shuffle "USE std::shuffle!";

// type/const
#define int ll
using ll = long long;
using ull = unsigned long long;
using ld = long double;
using PAIR = std::pair<int, int>;
using PAIRLL = std::pair<ll, ll>;
constexpr int INFINT = (1 << 30) - 1;                    // 1.07x10^ 9
constexpr int INFINT_LIM = (1LL << 31) - 1;              // 2.15x10^ 9
constexpr ll INFLL = 1LL << 60;                          // 1.15x10^18
constexpr ll INFLL_LIM = (1LL << 62) - 1 + (1LL << 62);  // 9.22x10^18
constexpr double EPS = 1e-10;
constexpr int MOD = 1000000007;
constexpr double PI = 3.141592653589793238462643383279;
template<class T, size_t N> void FILL(T(&a)[N], const T& val) { for (auto& x : a) x = val; }
template<class ARY, size_t N, size_t M, class T> void FILL(ARY(&a)[N][M], const T& val) { for (auto& b : a) FILL(b, val); }
template<class T> void FILL(std::vector<T>& a, const T& val) { for (auto& x : a) x = val; }
template<class ARY, class T> void FILL(std::vector<std::vector<ARY>>& a, const T& val) { for (auto& b : a) FILL(b, val); }
// ------------>8------------------------------------->8------------

int pow3[1000006];

std::map<V<int>, int> map;
int rec(V<int> a) {
	if (a[a[3]] == 0) {
		if (a[3] == 0) return pow3[a[1] + a[2]];
		return 0ll;
	}

	if (map.count(a)) return map[a];
	int& res = map[a];
	res = 0;

	--a[a[3]];
	REP(i, 3) {
		a[3] = i;
		(res += rec(a)) %= MOD;
	}
	return res;
}
int rec(int n, int m, int k) {
	map.clear();
	return rec({ n, m, k, 0 });
}

ll powMod(ll n, ll p, ll mod) {
	ll res = 1;
	while (p) {
		if (p & 1) (res *= n) %= mod;
		(n *= n) %= mod;
		p >>= 1;
	}
	return res;
}
ll invMod(ll n, ll mod) {
	return powMod(n, MOD - 2, MOD);
}

const signed FACT_MAX_N = 1000006;
signed fact[FACT_MAX_N];
signed factInv[FACT_MAX_N];
struct INIT_FACT {
	INIT_FACT() {
		fact[0] = 1;
		for (int i = 1; i < FACT_MAX_N; ++i) fact[i] = (long long)i * fact[i - 1] % MOD;
		factInv[FACT_MAX_N - 1] = powMod(fact[FACT_MAX_N - 1], MOD - 2, MOD);
		for (int i = FACT_MAX_N - 2; i >= 0; --i) factInv[i] = (long long)(i + 1) * factInv[i + 1] % MOD;
	}
} init_fact;

/* n,r<=10^6, query O(1)*/
ll Permutation(int n, int r) {
	if (r == 0) return 1;
	if (n < r) return 0;
	return (long long)fact[n] * factInv[n - r] % MOD;
}
ll Combination(int n, int r) {
	if (r == 0) return 1;
	if (n < r) return 0;
	return (long long)fact[n] * factInv[n - r] % MOD * factInv[r] % MOD;
}
ll CombinationWithRepetition(ll n, ll r) {
	return Combination(n + r - 1, r);
}

// Description: 整数列a[i],b[i]から列c[k]=sum{a[i]*b[k-i]}を生成する.任意modに対応.O(NlogN).

namespace NTT {
	std::vector<int> tmp;
	size_t sz = 1;

	inline int powMod(int n, int p, int m) {
		int res = 1;
		while (p) {
			if (p & 1) res = (ll)res * n % m;
			n = (ll)n * n % m;
			p >>= 1;
		}
		return (int)res;
	}
	inline int invMod(int n, int m) {
		return powMod(n, m - 2, m);
	}

	template <int Mod, int PrimitiveRoot>
	struct NTTPart {
		static std::vector<int> ntt(std::vector<int> a, bool inv = false) {
			size_t mask = sz - 1;
			size_t p = 0;
			for (size_t i = sz >> 1; i >= 1; i >>= 1) {
				auto& cur = (p & 1) ? tmp : a;
				auto& nex = (p & 1) ? a : tmp;
				int e = powMod(PrimitiveRoot, (Mod - 1) / sz * i, Mod);
				if (inv) e = invMod(e, Mod);
				int w = 1;
				for (size_t j = 0; j < sz; j += i) {
					for (size_t k = 0; k < i; ++k) {
						nex[j + k] = (cur[((j << 1) & mask) + k] + (ll)w * cur[(((j << 1) + i) & mask) + k]) % Mod;
					}
					w = (ll)w * e % Mod;
				}
				++p;
			}
			if (p & 1) std::swap(a, tmp);
			if (inv) {
				int invSz = invMod(sz, Mod);
				for (size_t i = 0; i < sz; ++i) a[i] = (ll)a[i] * invSz % Mod;
			}
			return a;
		}
		static std::vector<int> mul(std::vector<int> a, std::vector<int> b) {
			a = ntt(a);
			b = ntt(b);
			for (size_t i = 0; i < sz; ++i) a[i] = (ll)a[i] * b[i] % Mod;
			a = ntt(a, true);
			return a;
		}
	};

	constexpr int M[] = { 1224736769, 469762049, 167772161 };
	constexpr int PR[] = { 3, 3, 3 };
	constexpr int NTT_CONVOLUTION_TIME = 3;
	/*
		X := max(a)*max(b)*min(|a|, |b|) のとき,
		NTT_CONVOLUTION_TIME <- 1: X <         1224736769 = 1.2*10^ 9 ~ 2^30
		NTT_CONVOLUTION_TIME <- 2: X < 575334854091079681 = 5.8*10^17 ~ 2^59
		NTT_CONVOLUTION_TIME <- 3: X < 2^86 (32bit * 32bit * 10^7くらいまで)
	*/

	inline void garner(std::vector<int>* c, int mod) {
		if (NTT_CONVOLUTION_TIME == 1) {
			for (auto& x : c[0]) x %= mod;
		}
		else if (NTT_CONVOLUTION_TIME == 2) {
			const int r01 = invMod(M[0], M[1]);
			for (size_t i = 0; i < sz; ++i) {
				c[1][i] = (c[1][i] - c[0][i]) * (ll)r01 % M[1];
				if (c[1][i] < 0) c[1][i] += M[1];
				c[0][i] = (c[0][i] + (ll)c[1][i] * M[0]) % mod;
			}
		}
		else if (NTT_CONVOLUTION_TIME == 3) {
			const int R01 = invMod(M[0], M[1]);
			const int R02 = invMod(M[0], M[2]);
			const int R12 = invMod(M[1], M[2]);
			const int M01 = (ll)M[0] * M[1] % mod;
			for (size_t i = 0; i < sz; ++i) {
				c[1][i] = (c[1][i] - c[0][i]) * (ll)R01 % M[1];
				if (c[1][i] < 0) c[1][i] += M[1];
				c[2][i] = ((c[2][i] - c[0][i]) * (ll)R02 % M[2] - c[1][i]) * R12 % M[2];
				if (c[2][i] < 0) c[2][i] += M[2];
				c[0][i] = (c[0][i] + (ll)c[1][i] * M[0] + (ll)c[2][i] * M01) % mod;
			}
		}
	}
	std::vector<int> mul(std::vector<int> a, std::vector<int> b, int mod) {
		for (auto& x : a) x %= mod;
		for (auto& x : b) x %= mod;

		size_t m = a.size() + b.size() - 1;
		sz = 1;
		while (m > sz) sz <<= 1;
		tmp.resize(sz);
		a.resize(sz, 0);
		b.resize(sz, 0);

		std::vector<int> c[NTT_CONVOLUTION_TIME];
		if (NTT_CONVOLUTION_TIME >= 1) c[0] = NTTPart<M[0], PR[0]>::mul(a, b);
		if (NTT_CONVOLUTION_TIME >= 2) c[1] = NTTPart<M[1], PR[1]>::mul(a, b);
		if (NTT_CONVOLUTION_TIME >= 3) c[2] = NTTPart<M[2], PR[2]>::mul(a, b);
		for (auto& v : c) v.resize(m);
		garner(c, mod);
		return c[0];
	}
}; // !!! CHECK NTT_CONVOLUTION_TIME !!!

int calc500(int n, int m, int k) {
	int res = 0;
	REP(s, m + 1) REP(t, k + 1) {
		(res += (ll)fact[n - 1 + s + t] * factInv[n - 1] % MOD * factInv[s] % MOD * factInv[t] % MOD * pow3[m + k - s - t]) %= MOD;
	}
	return res;
}

int calc1100(int n, int m, int k) {
	V<int> a;
	{
		V<int> b(m + 1);
		REP(i, m + 1) b[i] = factInv[i];
		V<int> c(k + 1);
		REP(i, k + 1) c[i] = factInv[i];
		a = NTT::mul(b, c, MOD);
	}

	int res = 0;
	REP(l, m + k + 1) {
		(res += (ll)fact[n - 1 + l] * factInv[n - 1] % MOD * pow3[m + k - l] % MOD * a[l]) %= MOD;
	}
	return res;
}

signed main() {
	INIT;

	pow3[0] = 1;
	FOR(i, 1, 1000006) pow3[i] = pow3[i - 1] * 3 % MOD;

	VAR(int, n, m, k);
	OUT(calc1100(n, m, k))BR;

	return 0;
}


Measured memory_bytes: 86180