for i in range(1,10):

    for j in range(1,i+1):

        print(f"{j}*{i}={i*j}",end='\t')

    print()

L = []

for i in range(2,10):

    flag = True

    for j in range(2,i): #这就不包括1和本身了

        if i % j == 0:

            flag = False

            break

    if flag == True:

        L.append(i)

print(sum(L))