Respuesta :

triangle = 4
circle = 2
" shot-glass " = 0

check..
circle * shot-glass = shot-glass
   2     *     0           =     0

circle * circle  = triangle
   2    *    2      =    4

triangle + shot-glass = triangle
  4         +      0          =    4

circle + circle = triangle
   2     +    2    =    4

yep...it checks out