My friend Brian tells me this:
"Do you guys need a calculator on the web? The best scientific calculator is on Google.
Just type a mathematical expression into the search text box and Google gives the answer.
Type in "2 + 2" (without the quotes) which evaluates to 4.
"5 mod 3" evaluates to 2 (modulo arithmetic)
"sine(30 degrees)" evaluates to 0.5
Note that trig functions default to radians, unless you specify degrees.
"2 ** 3" evaluates to 8 (** represents exponents, so does ^).
"sqrt(9)" evaluates to 3.
Also converts units of measure!
"half liter in pints" evaluates to 1.0566882 US pints
Also converts hexadecimal numbers to decimal and back.
11 = 0xB
0xff = 255"
I'd seen the calculator, but I didn't know that it converts of units of measure and and hex/decimal numbers. Those will come in handy! Thanks, Brian.