Differentiation

Let \(f\) be a differentiable function such that \(\mathrm{f}(1)=2\) and \(\mathrm{f}^{\prime}(x)=\mathrm{f}(x)\), for all \(x \in \mathrm{R}\). If \(\mathrm{h}(x)=\mathrm{f}(\mathrm{f}(x))\), then \(\mathrm{h}^{\prime}(1)\) is equal to