#include <iostream>
#include <string.h>
#include <stdlib.h>
#include <cstdio>

using namespace std;
struct stiva
{
    float v[100000];
    float ordin[100000];
    int varf=-1;
    int vordin=0;
};

void pushordin(stiva &stk,int x)
{
    stk.vordin++;
    stk.ordin[stk.vordin]=x;

}
void push(stiva &stk, float x)
{
    stk.varf++;
    stk.v[stk.varf]=x;
}
void isEmpty()
{
    cout<<"Stiva este goala!"<<endl;
}
void pop(stiva &stk)
{
    stk.varf--;
}

void popordin(stiva &stk)
{
    stk.vordin--;
}
void afiseaza(stiva &stk)
{

    if(stk.varf>=0)
        for(int i=0;i<=stk.varf;i++)
            cout<<stk.v[i]<<" ";

}
void afiseazao(stiva &stk)
{
    if(stk.vordin>=0)
        for(int i=1;i<=stk.vordin;i++)
            cout<<stk.ordin[i]<<" ";
}

int main()
{
    freopen( "evaluare.in", "r", stdin);
    freopen( "evaluare.out", "w", stdout);
    char s[100];
    stiva stk1,stk2;
    int i=0, x=0,k=0,o=1;
    long long int S=0;
    cin>>s;

    while(s[i]!='\0'){

        switch (s[i])
        {
        case '+':
            push(stk1,s[i]);
            pushordin(stk1,1+k);
            o++;

            x=0;
            break;
        case '-':
            push(stk1,s[i]);
            pushordin(stk1,1+k);
            o++;
            x=0;
            break;
        case '*':
            push(stk1,s[i]);
            pushordin(stk1,2+k);
            o++;
            x=0;
            break;
        case '/':
            push(stk1,s[i]);
            pushordin(stk1,2+k);
            o++;
            x=0;
            break;
        case '(':
            k=k+10;
            o=0;
            break;
        case ')':
            k=k-10;
            break;

        default:

            x = x * 10 + int(s[i]-'0');

            if(s[i+1]<'0'||s[i+1]>'9')
            {
                push(stk2,x);
            }
            break;
        }
        i++;
        if((stk1.vordin>=2) && (stk1.ordin[stk1.vordin]>stk1.ordin[stk1.vordin-1])&&stk2.varf>stk1.varf&&o>1)
        {
            pop(stk2);
            pop(stk2);
            pop(stk1);
            popordin(stk1);
            if(stk1.v[stk1.varf+1]=='/'){
                float rez = stk2.v[stk2.varf+1] /stk2.v[stk2.varf+2];
                push(stk2,rez);}

            if(stk1.v[stk1.varf+1]=='*'){
                float rez = stk2.v[stk2.varf+1] *stk2.v[stk2.varf+2];
                push(stk2,rez);}
            if(stk1.v[stk1.varf+1]=='+'){
                float rez = stk2.v[stk2.varf+1] +stk2.v[stk2.varf+2];
                push(stk2,rez);}
            if(stk1.v[stk1.varf+1]=='-'){
                float rez = stk2.v[stk2.varf+1] -stk2.v[stk2.varf+2];
                push(stk2,rez);}
        }

    }

    S=0;int t=0;

    if(stk1.v[0]=='*'||stk1.v[0]=='/'){
        S=stk2.v[0];
        t=1;}
    for(i=0;i<=stk2.varf-1;i++){
        if(stk1.v[i]=='+')
            S=S+stk2.v[i+1];
        else if(stk1.v[i]=='-')
            S=S-stk2.v[i+1];
        else if(stk1.v[i]=='*')
                S=S*stk2.v[i+1];
        else if(stk1.v[i]=='/')
            S=S/stk2.v[i+1];


       }


    if(t==0)
        cout<<S+stk2.v[0];
    else
        cout<<S;

    return 0;
}