#include <bits/stdc++.h>
#define rep(i, n) for(int i= 0; i < (n); i++)
using ll= long long int;
using namespace std;
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
ll mod= 1e9 + 7;


int main(){
  ll p,n;
  cin >> p >> n;
  ll a[n];
  rep(i,n)cin >> a[i];
  ll up=a[0],down=1;
  for(int i=1;i<n;i++){
    char g;
    cin >> g;
    if(g=='+'){up+=down*a[i];}
    else if(g=='-'){up-=down*a[i];}
    else if(g=='*'){up*=a[i];}
    else if(g=='/'){down*=a[i];}

    if(__gcd(up,down)!=1){
      ll q=__gcd(up,down);
      up/=q;
      down/=q;
    } 
  }
  while(up<0){up+=p;}
  cout << up/down << endl;
}