#include<stdio.h>
#include<stdlib.h>
#include<string.h>
#include<math.h>
char c1[101],c2[101],c3[101];
float a[101];
int main(){
int i,j,k,m,n;
int top=0,v=-1,u=0;
gets(c1);
k=strlen(c1);
for(i=0;i<k;i++){
switch(c1[i]){
case '(':c2[++top]=c1[i];break;
case '+':
case '-':while(top>0 && c2[top]!='('){
c3[++v]=c2[top];
c3[++v]=' ';
top--;
}
c2[++top]=c1[i];
break;
case '*':
case '/':while(top>0 && c2[top]!='(' && c2[top]!='+' && c2[top]!='-'){
c3[++v]=c2[top];
c3[++v]=' ';
top--;
}
c2[++top]=c1[i];
break;
case ')':while(c2[top]!='('){
c3[++v]=c2[top];
c3[++v]=' ';
top--;
}
top--;
break;
default:
c3[++v]=c1[i];
if(c1[i+1]>'9' || c1[i+1]<'0')
c3[++v]=' ';
break;
}
}
while(top>0 && c2[top]!='('){
c3[++v]=c2[top];
c3[++v]=' ';
top--;
}
puts(c3);
top=0;
float sum;
k=strlen(c3);
for(i=0;i<k;i++){
if(c3[i]==' ');
else if(c3[i]=='+'){sum=a[top-1]+a[top];a[--top]=sum;}
else if(c3[i]=='-'){sum=a[top-1]-a[top];a[--top]=sum;}
else if(c3[i]=='*'){sum=a[top-1]*a[top];a[--top]=sum;}
else if(c3[i]=='/'){sum=a[top-1]/a[top];a[--top]=sum;}
else{
int m=0;
while(c3[i]>='0' && c3[i]<='9'){
m=10*m+c3[i]-'0';
i++;
}
a[++top]=m;
}
}
printf("%.8f\n",a[top]);
return 0;
}