Q=int(input())
for _ in range(Q):
  S,M=input().split()
  M=int(M)
  N=len(S)
  u=[1]*N
  mod=M
  if M==1:
    print(0)
    continue
  for i in range(1,N):
    u[i]=u[i-1]*10
    u[i]%=mod
  x=0
  for i in range(N):
    x+=int(S[-(i+1)])*u[i]
    x%=mod
  if M%2==1:
    result=x*(x+1)
    result%=mod
    result*=pow(2,-1,mod)
    result%=mod
    print(result)
  else:
    result=x*(x+1)//2
    result%=mod
    u2=[1]*N
    mod2=2*M
    for i in range(1,N):
      u2[i]=u2[i-1]*10
      u2[i]%=mod2
    z=0
    for i in range(N):
      z+=int(S[-(i+1)])*u2[i]
      z%=mod2
    if x%2==0:
      if z!=x:
        result+=(M//2)*(x+1)
        result%=mod
    else:
      if ((z+1)%mod2)!=((x+1)%mod):
        result+=(M//2)*x
        result%=mod
    print(result)