understanding numpy np.tensordot

Question

arr1 = np.arange(8).reshape(4, 2)
arr2 = np.arange(4, 12).reshape(2, 4)
ans=np.tensordot(arr1,arr2,axes=([1],[0]))
ans2=np.tensordot(arr1,arr2,axes=([0],[1]))
ans3 =