Smart calculator for engineers.

arv means number in estonian language.

[x] Binary, octal, decimal and hexadecimal numbers mixup
[x] Units (SI) and formulas solving (e.g. 10m/s * 1h = 36km/h)
[ ] Date and time conversion (e.g. 10000s->h = 2.7778h)
[ ] Currency conversion (online access)
[ ] Detection of "round numbers" (million, etc.)
[ ] Detection of fractions (1/2, 3/4, etc).
[ ] Detection of digital numbers (KiB, etc.)
[ ] Detection of prime numbers
[ ] Constants (Pi, e, etc.)
[ ] Electronic helpers. E.g. (103.2 R= show closest standard resistor values) \

[ ] Symbol text simplifier when using pure ASCII. Such as: µ=u, ²=^2, ρ=p
[ ] Expression simplifier for square equations (X*X => X**2) because detection of units require it.