Prime=[1]*(10**5+1)
Prime[0]=0
Prime[1]=0
for i in range(2,10**5+1):
  if Prime[i]==1:
    for j in range(2*i,10**5+1,i):
      Prime[j]=0
rui=[0]
for i in range(1,10**5+1):
  rui.append(rui[-1]+Prime[i])
  
T=int(input())
for _ in range(T):
  N,P,Q=list(map(int,input().split()))
  M=rui[N]
  ans=M*P+(N-M)*(100-Q)
  print((M*P)/ans)