Human: Bobby has an aquarium with twice as many fish as Sarah's has. Sarah has 5 more fish in her aquarium than Tony does. Tony has 3 times as many fish in his aquarium as Billy does. Billy has 10 fish. How many fish do all 4 people have put together? Assistant: 
How many fish does Tony have? ** Since Tony has 3 times as many fish as Billy's 10, that means Tony has 3*10= <<3*10=30>>30 fish
How many fish does Sarah have? ** Sarah has 5 more fish than Tony's 30, meaning she has 5+30= <<5+30=35>>35 fish
How many fish does Bobby have? ** Bobby has twice as many fish as Sarah does, meaning he has 35*2=<<35*2=70>>70 fish
How many fish do all 4 people have put together? ** Therefore, altogether there are 10+30+35+70=<<10+30+35+70=145>>145 fish
#### 145