#associativity

Let $\mathbf{A} \in \mathbb{R}^{2^{10} \times 2^{16}}$, $\mathbf{B} \in \mathbb{R}^{2^{16} \times 2^{5}}$ and $\mathbf{C} \in \mathbb{R}^{2^{5} \times 2^{14}}$. Multiplying an $n \times k$ matrix by a $k \times m$ matrix takes $nkm$ scalar multiplications. How many times more multiplications does $\mathbf{A}(\mathbf{B}\mathbf{C})$ need than $(\mathbf{A}\mathbf{B})\mathbf{C}$? Round to 1 decimal.