#include<bits/stdc++.h> using namespace std; #define inf INT_MAX #define INF LLONG_MAX #define ll long long #define ull unsigned long long #define M (int)(1e9+7) #define P pair<int,int> #define PLL pair<ll,ll> #define FOR(i,m,n) for(int i=(int)m;i<(int)n;i++) #define RFOR(i,m,n) for(int i=(int)m;i>=(int)n;i--) #define rep(i,n) FOR(i,0,n) #define rrep(i,n) RFOR(i,n,0) #define all(a) a.begin(),a.end() #define IN(a,n) rep(i,n){ cin>>a[i]; } const int vx[4] = {0,1,0,-1}; const int vy[4] = {1,0,-1,0}; #define PI 3.14159265 #define F first #define S second #define PB push_back #define EB emplace_back #define int ll #define vi vector<int> string s; int i=0; int f(){ int res=0; while(i<s.size()&&'0'<=s[i]&&s[i]<='9'){ res*=10; res+=s[i]-'0'; i++; } return res; } signed main(){ cin.tie(0); ios::sync_with_stdio(false); cin>>s; int ans=f(); while(i<s.size()){ if(s[i]=='+'){ i++; int res=f(); ans*=res; }else if(s[i]=='*'){ i++; int res=f(); ans+=res; } } cout<<ans<<endl; }