multi of square matrix

c=int(input("enter no.of columns:"))
r=int(input("enter no.of rows:"))
print("enter 1st matrix elements")
m1=[]
for i in range (r):
    print("enter elemnts of row",i+1)
    n=[]
    for j in range (c):
        x=int(input())
        n.append(x)
    m1.append(n)
print("enter 2nd matrix elements")
m2=[]
for i in range (r):
    print("enter elemnts of row",i+1)
    n=[]
    for j in range (c):
        x=int(input())
        n.append(x)
    m2.append(n)
for i in range (r):
    for j in range (r):
        x=0
        for k in range (r):
            a=m1[i][k]
            b=m2[k][j]
            x=x+a*b
        print(x,end=" ")
    print(" ")