First find the number of spiral shells Jackson collects: 45 hermit crabs * 3 spiral shells/hermit crab = <<45*3=135>>135 spiral shells

Then find the number of starfish he collects: 135 spiral shells * 2 starfish/spiral shell = <<135*2=270>>270 starfish

Then add the number of each animal he collects to find the total number: 135 spiral shells + 270 starfish + 45 hermit crabs = <<135+270+45=450>>450 souvenirs

# Answer

450
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Jackson collects 45 hermit crabs, 3 spiral shells per hermit crab, and 2 starfish per spiral shell. How many souvenirs does he collect total?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
450
Jackson collects 45 hermit crabs, 3 spiral shells per hermit crab, and 2 starfish per spiral shell. How many souvenirs does he collect total?
train