#include<bits/stdc++.h>
using namespace std;
int a[10000],b[10000],c,d,g=-100000;
double f[10000];
int main(){
cin>>c>>d;
for(int i=1;i<=c;i++){
	cin>>a[i]>>b[i];
	f[i]=a[i]*1.0/b[i];
	if(f[i]>g){
		g=i;
	}
} 
printf("%.2lf",d*1.0/a[g]*b[g]);
}