#include <stdio.h>
double distance_checker(double D, double v,double T, double w);
int main() {
    FILE*fin = fopen("input.txt","r");
    FILE*fout = fopen("output.txt","w");

    double D, T , v1 , v2, w1, w2, maximum_distance;
    double distance[4];

    fscanf(fin,"%lf%lf%lf%lf%lf%lf", &D, &T, &v1, &v2, &w1, &w2);
    distance[0] = distance_checker(D, v1, T, w1);
    distance[1] = distance_checker(D, v2, T, w1);
    distance[2] = distance_checker(D, v1, T, w2);
    distance[3] = distance_checker(D, v2, T, w2);
    maximum_distance = 0;
    for (int i = 0; i < 4; ++i) {
        if (distance[i] >= maximum_distance){
            maximum_distance = distance[i];
        }
        if (maximum_distance > D){
            maximum_distance = D;
        }
    }
    fprintf(fout,"%lf",maximum_distance);
    fclose(fin);
    fclose(fout);
    return 0;
}

double distance_checker(double D, double v,double T, double w) {
    if (v-w == 0){
        return 0;
    }
    double distance = (D - w * T) * v / (v - w);
    if (((D - w * T) / (v - w)) > T){
        return T*v;
    }
    if (distance>D){
        return D;
    }
    return distance;
}