Jesse is playing with a pile of building blocks. He first builds a building with 80 building blocks. Then he builds a farmhouse with 123 building blocks. He adds a fenced-in area next to the farm made of 57 building blocks. If Jesse has 84 building blocks left, how many building blocks did he start with?
Jesse built three structures out of building blocks, 80 + 123 + 57 = <<80+123+57=260>>260 building blocks.
Jesse started with 260 + 84 leftover building blocks = <<260+84=344>>344 building blocks that Jesse had originally.
#### 344