/* solution to practice problem "gears" by Bob Roos */
#include <stdio.h>

double dabs(double x) {
  if (x < 0.0) return -x;
  return x;
}

int main() {
  int i, j, n, fi, ri;
  double PI = 3.14159;
  int f[3], r[9], diam, target;
  int closestf, closestr;
  double bestsofar = -1;
  double size;

  scanf("%d",&n);
  for (i = 0; i < n; i++) {
    scanf("%d %d %d",&f[0],&f[1],&f[2]);
    for (j = 0; j < 9; j++)
      scanf("%d",&r[j]);
    scanf("%d %d",&diam,&target);
    
    for (fi = 0; fi < 3; fi++) {
      for (ri = 0; ri < 9; ri++) {
        size = PI*diam*f[fi]/(double)r[ri];
        if (dabs(size - target) < dabs(bestsofar - target)) {
          bestsofar = size;
          closestf = fi;
          closestr = ri;
        }
      }
    }
    if (i) {
      printf("\n");
    }
    printf("A gear selection of %d/%d produces a gear size of %0.3lf.\n",
         f[closestf],r[closestr],bestsofar);
  }
}