#include<stdio.h>
main(){
    int a,ans = 0;
    char c;
    scanf("%d%c%d",&ans,&c,&a);
    if(c=='+'){ans+=a;}
    else{ans*=a;}
    scanf("%c",&c);
    while(c!=10){
        scanf("%d",&a);
        if(c=='+'){ans+=a;}
        else{ans*=a;}
        scanf("%c",&c);
    }
    printf("%d\n",ans);
}