[Python] ValueError: matmul: Input operand 1 has a mismatch in its core dimension 0, with...

I have written code using matmul, but I am getting the following error:

"ValueError: matmul: Input operand 1 has a mismatch in its core dimension 0, with gufunc signature (n?,k),(k,m?)->(n?,m?) (size 1 is different from 3)"


Code:

R = [[0.40348195], [0.38658295], [0.82931052]]
V = [0.33452744, 0.33823673, 0.32723583]
print("Rt_p: ", R)
B = np.matmul(V,np.transpose(R))/pow(LA.norm(R), 2)
print("B", B)

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