By accident, I discovered that if you type “e” into Google, the Google calculator is invoked and shows you e = 2.71828183, the transcendental number that is the base of the natural log. I’ve also found that it will pop out answers for pi, k (the Boltzmann constant), c (speed of light), and h (Planck’s constant).
You can also type in calculations such as 700*55.31 to use Google as a calculator.