C++ :

#include <cstdio>
int main(){
    int n;
    if(scanf("%d",&n)!=1) return 0;
    for(int b=1234; b<=98765; b++){
        int a = b*n;
        if(a>=100000) continue;
        char A[8], B[8];
        sprintf(B, "%05d", b);
        sprintf(A, "%05d", a);
        int seen=0, ok=1;
        for(int i=0;i<5;i++){ int d=B[i]-'0'; if(seen>>d&1){ok=0;break;} seen|=1<<d; }
        if(!ok) continue;
        for(int i=0;i<5;i++){ int d=A[i]-'0'; if(seen>>d&1){ok=0;break;} seen|=1<<d; }
        if(!ok) continue;
        printf("%s / %s = %d\n", A, B, n);
    }
    return 0;
}