// #pragma GCC optimize("Ofast")
// #pragma GCC optimize("unroll-loops")
// #pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,avx2")
#include <bits/stdc++.h>
// #define int long long
#define i64 long long
#define pii pair <int, int> 
using namespace std;
inline int read(void) {
    int x=0,sgn=1; char ch=getchar();
    while(ch<48||57<ch) {if(ch==45)sgn=0;ch=getchar();}
    while(47<ch&&ch<58) {x=x*10+ch-48;   ch=getchar();}
    return sgn? x:-x;
}
void write(int x) {
    if(x<0) putchar('-'),x=-x;
    if(x>9) write(x/10);
    putchar(x%10+'0');
}
/*
    write((Ans%p+p)%p); pls
*/
#define double long double
int n;
int x[1000006],y[1000006],vx[1000006],vy[1000006];
inline void chkmin(double&x,double y) { x=min(x,y); }
inline void chkmax(double&x,double y) { x=max(x,y); }
inline double check(double t) {
    double mix,mxx,miy,mxy;
    mix=mxx=x[1]+vx[1]*t;
    miy=mxy=y[1]+vy[1]*t;
    for(int i=2; i<=n; ++i) {
        chkmin(mix,x[i]+vx[i]*t);
        chkmax(mxx,x[i]+vx[i]*t);
        chkmin(miy,y[i]+vy[i]*t);
        chkmax(mxy,y[i]+vy[i]*t);
    }
    // cerr<<"t = "<<t<<'|'<<mix<<' '<<mxx<<' '<<miy<<' '<<mxy<<endl;
    return (mxx-mix)*(mxy-miy);
}
signed main() {
    // freopen("localinput","r",stdin);
    // freopen("localoutput","w",stdout);
    n=read();
    for(int i=1; i<=n; ++i) x[i]=read(),y[i]=read(),vx[i]=read(),vy[i]=read();
    double L=0,R=1000000000000;
    for(int t=0; t<=400; ++t) {
        double ml=(2*L+R)/3;
        double mr=(L+2*R)/3;
        if(check(ml)<check(mr)) R=mr;
        else L=ml;
    }
    // cerr<<L<<endl;
    printf("%.12Lf\n",check(L));
    // fprintf(stderr,"%.4lf\n",1.0*clock()/CLOCKS_PER_SEC);
    return 0;
}