You can either put down boxes where you want the tables to go, put the tables inside and then use a hatchet on the boxes. Also you can place a trash barrel (I wish to place a trash barrel), put the table inside, and then use an axe on it. I don't recommend this method for anything that is valuable. Also you can get a blue beetle, put the item on it, and have the blue beetle stand where you want it to then tell it to drop. That might be easiest...
Mount your blue beetle and stand at one end of where the table will end up being. Hop off and walk one tile away along the line of where the tables will be. Put the table on the beetle and say "Name drop" where name is the name of the beetle - can only be one word I believe. Walk one tile along the line of where the tables will be and repeat the procedure. You'll be dropping tables behind you in a nice row. Don't worry if they are crooked, you can use the int dec tool to turn them. Do the same thing for the next line.