Calculating with counters

+

Addition, e.g.: #11=#10+7

-

Subtraction, e.g.: #L=#L-2

*

Multiplication, e.g.: #10=#11*3

/

Division, e.g.: #8=#103/4

()

Prioritization using brackets; dot for dash applies

EVEN#n

Counter n contains only even number values, rounds off

EVEN4#n

Counter n contains only 4 divisible number values, rounds off