#define _CRT_SECURE_NO_WARNINGS 1
#include<stdio.h>
#include<math.h>
int main()
{
	float req = 0; 
	scanf("%f", &req);
    float x1 = 0;
	float x2 = 0;
	int  min =(1<<31)^(-1) ;
	for (int i = 0; i < 3; i++)
	{
		float n = 0;
		scanf("%f", &x1);
		scanf("%f", &x2);
		float a = 0;
		a = req * (x2 / x1);
		int b = a;
		if (a > b)
			b += 1;
		for (b; b % (int)x2 != 0; b++)
		{

		}
		if (b< min)
		{
			min = b;
		}
	}
	printf("%d", min);
	return 0;
}