1 #include <cstdio>
 2 #include <cstring>
 3 #define MAX 100002
 4 using namespace std;
 5 
 6 bool f[MAX];
 7 
 8 int main()
 9 {
10     int t,n;
11     //freopen("data.txt","r",stdin);
12     scanf("%d",&t);
13     while(t--){
14         scanf("%d",&n);
15         if(n<0){
16             printf("-");
17             n=-n;
18         }
19         if(n==1){
20             printf("1\n");
21             continue;
22         }
23         printf("0.");
24         memset(f,0,sizeof(f));
25         int m;
26         m=1;
27         f[m]=1;
28         while(m){
29             m=m*10;
30             printf("%d",m/n);
31             m=m%n;
32             if(f[m]) break;
33             f[m]=1;
34         }
35         printf("\n");
36     }
37     return 0;
38 }