In case it’s unclear (as the * got turned into italics) I believe @garth is referring to the format:
0.5*876=
which I agree is a fantastic feature of OneNote. In a Findings implementation, it would be excellent to have all standard mathematical operators, including intelligent handling of parentheses and scientific notation, and possibly certain constants and functions:
Standard operators: +,-,*,/
Exponentiation: ^ or **
Scientific notation: variants might include 1.23e4 and 5.67E-03
Constants?: pi, e
Maybe also basic functions?: sqrt, min/max, ceil/floor, (arc)sin/cos/tan, etc.
I write a lot of inline math in my entries, and agree this would be a great feature!