#include<iostream>
#include<iomanip>
#include<cstdio>
#include<cstdlib>
#include<math.h>
#include<algorithm>
#include<string>
#include<vector>
#include<list>
#include<set>
#include<map>
#include<queue>
#include<stack>
#define REP(i, N) for(ll i = 0; i < N; ++i)
#define REEP(i, N) for(ll i = N - 1; i >= 0; --i)
#define FOR(i,m,n) for(ll i = m; i < n; ++i)
#define RFOR(i,m,n) for(ll i = n - 1; i >= m; --i)
#define ALL(a) (a).begin(),(a).end()
#define pb push_back
#define PB push_back
#define KIRIAGE(a, b) a += (b - a % b) % b // a を b の倍数値まで増やす
#define CEIL(c, a, b) if(a % b == 0) { c = a / b;} else { c = a / b + 1;} // a / b 以上の最小整数
#define sp(n) setprecision(n)
#define INF 1000000000
#define MOD 1000000007
using namespace std;
typedef long long ll;
typedef pair<ll, ll> P;
int dx4[4] = {1, 0, -1, 0};
int dy4[4] = {0, 1, 0, -1};
int dx8[8] = {1, 1, 0, -1, -1, -1, 0, 1};
int dy8[8] = {0, 1, 1, 1, 0, -1, -1, -1};
int main(void) {
ll A, B, C;
cin>>A>>B>>C;
if(A % 2 == 0 || B % 2 == 0 || C % 2 == 0) cout<<0<<endl;
else cout<<min(min(A*B, B*C), C*A)<<endl;
}