Multiplication of 2 Matrices

def transpose(Mat) :
    T_mat = []

    for i in range(len(Mat[0])) :
        temp = []
        for j in range(len(Mat)) :
            temp.append(Mat[j][i])
        T_mat.append(temp)

    return T_mat

def main() :
    row_1 = int(input("Enter the number of rows in the First Matrix : "))
    col_1 = int(input("Enter the number of columns in the First Matrix : "))
    row_2 = col_1
    col_2 = int(input("\nEnter the number of columns in the Second Matrix : "))

    M1 , M2 , mul_mat = [],[],[]

    for i in range(row_1) :
        temp = []
        for j in range(col_1) :
            elem = eval(input("Enter the Element of the First Matrix at the Position ; Row : {} , Column : {} =====> ".format(i+1,j+1)))
            temp.append(elem)
        M1.append(temp)

    print()
    for i in range(row_2) :
        temp = []
        for j in range(col_2) :
            elem = eval(input("Enter the Element of the Second Matrix at the Position ; Row : {} , Column : {} =====> ".format(i+1,j+1)))
            temp.append(elem)
        M2.append(temp)

    print("\nMatrix A : ")
    for i in M1 :
        for j in i :
            print(j , end = "  ")
        print()

    print("\nMatrix B : ")
    for i in M2 :
        for j in i :
            print(j , end = '  ')
        print()

    M2 = transpose(M2)

    for i in range(len(M1)) :
        temp = []
        for j in range(len(M2)) :
            sum_val = 0
            for k in range(len(M2[0])) :
                sum_val += (M1[i][k] * M2[j][k])
            temp.append(sum_val)
        mul_mat.append(temp)

    print("\nMultiplication of A over B (A X B) : ")
    for i in mul_mat :
        for j in i :
            print(j , end = '  ')
        print()

main()