The shells come from crabs. theres one
It’s is 1800
Hope this helps
Have a great day/night
5+x
Don't you have any other information?
Draw 2 circles one cut straight down the middle and straight across the middle from the side making a plus shape then do the same to the 2nd but also in each of the 4 triangles you made in the 2nd one split them down the middle again