uri 1000

#include <bits/stdc++.h>

using namespace std;
typedef long long ll;

struct item
{
    double weight;
    double price;
    double unitprice;
};

int main()
{
    #ifndef ONLINE_JUDGE
        freopen("input.txt", "r", stdin);
        freopen("output.txt", "w", stdout);
    #endif

    int n;
    cin >> n;
    item arr[n];
    int capacity;
    cin >> capacity;
    for(int i=0;i<n;i++)
        cin >> arr[i].weight >> arr[i].price;

    for(int i=0;i<3;i++)
        arr[i].unitprice = (arr[i].price/arr[i].weight);

    for(int i=0;i<n-1;i++)
    {
        int key=i;
        for(int j=i+1;j<n;j++)
            if(arr[j].unitprice>arr[key].unitprice)
                key = j;
        swap(arr[key],arr[i]);
    }
    //sort(arr,arr+n,cmp);
    for(int i=0;i<n;i++)
        cout << arr[i].unitprice << endl;
    double bag=0;
    int ind=0;
    while(ind!=n and capacity>0)
    {
        if(arr[ind].weight<=capacity)
        {
            bag+=arr[ind].price;
            capacity-=arr[ind].weight;
            arr[ind].weight=0;
        }
        else
        {
            bag+=(arr[ind].unitprice*capacity);
            capacity=0;
        }
        ind++;
    }
    cout << bag << endl;

    return 0;
}