T = int(input())

for _ in range(T):
    N, M = input().split()
    M = int(M)
    h = 0
    m = 0
    for i in range(len(N)):
        m = m*10+int(N[i])
        h = (h*10+m//2)%M
        m %= 2
    m += 1
    if m == 2:
        m = 0
        h += 1
    n = 0
    for i in range(len(N)):
        n = (n*10+int(N[i]))%M
    print((h*n+(n-h)*m)%M)