I have the answer but I need proof I did it. Pls edit the pic and show work I will give a brainlist point.

Answer:
the formula for parallelogram is B*H so answer is 36 which u have
Step-by-step explanation:
so area of parallelogram photos is b*h which is6*4=24
area of parallelogram board is 24*36
now divide to find number of photos
24*36/24
24 cancel each other and answer is 36