#include<bits/stdc++.h>
using namespace std;

int gcd(int a, int b, int &x, int &y)
{
    if (a == 0)
    {
        x = 0;
        y = 1;
        return b;
    }
    int x1, y1;
    int d = gcd(b%a, a, x1, y1);
    x = y1 - (b / a) * x1;
    y = x1;
    return d;
}

bool find_any_solution(int a, int b, int c, int &x0, int &y0, int &g)
{
    g = gcd(abs(a), abs(b), x0, y0);
    if (c % g)
    {
        return false;
    }
    x0 *= c / g;
    y0 *= c / g;
    if (a < 0)
        x0 = -x0;
    if (b < 0)
        y0 = -y0;
    return true;
}
void shift_solution(int & x, int & y, int a, int b, int cnt)
{
    x += cnt * b;
    y -= cnt * a;
}

int find_all_solutions(int a, int b, int c, int minx, int maxx, int miny, int maxy)
{
    int x, y, g;
    if (!find_any_solution(a, b, c, x, y, g))
        return 0;
    a /= g;
    b /= g;

    int sign_a = a > 0 ? +1 : -1;
    int sign_b = b > 0 ? +1 : -1;

    shift_solution(x, y, a, b, (minx - x) / b);
    if (x < minx)
        shift_solution(x, y, a, b, sign_b);
    if (x > maxx)
        return 0;
    int lx1 = x;

    shift_solution(x, y, a, b, (maxx - x) / b);
    if (x > maxx)
        shift_solution(x, y, a, b, -sign_b);
    int rx1 = x;

    shift_solution(x, y, a, b, -(miny - y) / a);
    if (y < miny)
        shift_solution(x, y, a, b, -sign_a);
    if (y > maxy)
        return 0;
    int lx2 = x;

    shift_solution(x, y, a, b, -(maxy - y) / a);
    if (y > maxy)
        shift_solution(x, y, a, b, sign_a);
    int rx2 = x;

    if (lx2 > rx2)
        swap(lx2, rx2);
    int lx = max(lx1, lx2);
    int rx = min(rx1, rx2);

    if (lx > rx)
        return 0;
    return (rx - lx) / abs(b) + 1;
}
int main()
{
    int a,b,c,x1,x2,y1,y2;
    cin>>a>>b>>c>>x1>>x2>>y1>>y2;
    cout<<find_all_solutions(a,b,c,x1,x2,y1,y2)<<endl;
}