#include <stdio.h>

#include <string.h>

#include <stdlib.h>

double getstr(int bgn, int nd, char *str){

char nstr[128]="";

for(int i=bgn; i<nd; i++){

nstr[i-bgn]=str[i];

}

return atof(nstr);

}

double act(double CurrentC, float NewC, char sym[1]){

if(sym[0]=='-') return CurrentC-NewC;

if(sym[0]=='+') return CurrentC+NewC;

if(sym[0]=='/') return CurrentC/NewC;

if(sym[0]=='*') return CurrentC*NewC;

return 0;

}

int main(){

char m[256];

char CurrentType[1]="+";

int CurrentTypeValue=0;

double LastValue=0.0;

scanf("%s",m);

for(int i=0; i<strlen(m); i++){

if(m[i]=='-' || m[i]=='+' || m[i]=='/' || m[i]=='*' || m[i+1]=='\0'){

if(i==0){

CurrentType[0]=m[i];

CurrentTypeValue++;

}

else if(m[i+1]=='\0'){

printf("%.2f\n", act(LastValue, getstr(CurrentTypeValue, i+1, m), CurrentType));

}

else{

LastValue=act(LastValue, getstr(CurrentTypeValue, i+1, m), CurrentType);

CurrentType[0]=m[i];

CurrentTypeValue=i+1;

}

}

}

}