#include<fstream>
using namespace std;
ifstream f("evaluare.in");
ofstream g("evaluare.out");
char s[100001];
int i=0;

float eval();
float termen();
float factor();


float eval()
{
	float r=termen();
	while(s[i]=='+' || s[i]=='-')
	{
		if(s[i]=='+')
		{
			i++;
			r=r+termen();
			
		}
		if(s[i]=='-')
		{
			i++;
			r=r-termen();
		}
	}
	return r;
}
float termen()
{
	float r=factor();
	while(s[i]=='/' || s[i]=='*')
	{
		if(s[i]=='*')
		{
			i++;
			r=r*factor();
		
		}
		if(s[i]=='/')
		{
			i++;
			r=r/factor();
		}
	}
	return r;
	
}
float factor()
{
	float r=0;
	if (s[i]=='(')
	{
		i++;
		r=eval();
		i++;
	}
	else
	{	
		while(s[i]>='0'&& s[i]<='9')
		{
			r=r*10 + float(s[i]-'0');
			i++;
			
		}
	}
	return r;
}

int main()
{
	f.getline(s,100001);
	g<<eval();
	return 0;
}