OEIS link for a description of lunar arithmetic
Simply take the larger digit when adding and take the smaller digit when multiplying.
Example
15866
X 147
_________
15766
14444
+ 11111
__________
1145766
965 Solvers
Find state names that start with the letter N
420 Solvers
118 Solvers
What is the distance from point P(x,y) to the line Ax + By + C = 0?
174 Solvers
27 Solvers