#include <bits/stdc++.h>

using namespace std;
float fn(int x,int y,string row[])
{
    float percent;
    int x1[4],y1[4],win=0,loss=0;
    x1[0]=x;
    y1[0]=y+1;
    x1[1]=x;
    y1[1]=y-1;
    x1[2]=x-1;
    x1[3]=x+1;
    y1[2]=y1[3]=y;
    
    for(int i=0;i<4;i++)
    {
        
        if(row[(x1[i])][(y1[i])]=='%')
        {
            win++;
        }
        else if(row[(x1[i])][(y1[i])]=='*')
        {
            loss++;
        }
        else if(row[(x1[i])][(y1[i])]=='O')
        {
            fn(x1[i],y1[i],row);
        }
    }
   percent=win/(win+loss);
    return percent;
}
int main() {
    int n;
    int m;
    int k,x,y;
    string row[100];
    cin >> n >> m >> k;
    for(int a0 = 0; a0 < n; a0++){
  
        cin >> row[a0];
        for(int i=0;i<m;i++)
        {
            if(row[a0][i]=='A')
            {
              x=n;
                y=i;
            }
        }
        // Write Your Code Here
    }
    for(int a0 = 0; a0 < k; a0++){
        int i1;
        int j1;
        int i2;
        int j2;
        cin >> i1 >> j1 >> i2 >> j2;
        // Write Your Code Here
    }
    cout<<fn(x,y,row);
    // Write Your Code Here
    return 0;
}