#include <cstdio>
#include <cstdlib>
main(){
double a1,a2,b1,b2;
while(scanf("%lf %lf %lf %lf",&a1,&a2,&b1,&b2)!=EOF){
//printf("%f %f %f %f",a1,a2,b1,b2);
double x=(b2-b1)/(a1-a2);
// printf("x=%f\n",x);
double y=a1*x+b1;
x=(int)(100*x+0.5);
y=(int)(100*y+0.5);
x/=100;
y/=100;
double x10=10*x,x100=x*100;
double y10=10*y,y100=y*100;
//printf("x=%f",x);
if(x==(int)x)
printf("%.0f\n",x);
else if(x10==(int)x10)
printf("%.1f\n",x);
else if(x100==(int)x100)
printf("%.2f\n",x);
if(y==(int)y)
printf("%.0f\n",y);
else if(y10==(int)y10)
printf("%.1f\n",y);
else if(y100==(int)y100)
printf("%.2f\n",y);
}
return 0;
}