Pretty cool, but why doesn't pressing equal again repeat the last step? Eg. on any decent calculator if you press: 2, x, 2, = You get 4. Press = again, you

Pretty cool, but why doesn't pressing equal again repeat the last step? Eg. on any decent calculator if you press: 2, x, 2, = You get 4. Press = again, you get 8, and so on. As insignificant as this may seem, lack of this in a calculator is a complete showstopper problem for me.