About a pound.
Yield is really interesting thing. It was my first questionmark in my mind when i start to grow (i am still newb). There is really no any mathematics here. What kind of light you are going to use? I am using 1000w HPS and 5x5 tent. So expecting 1000 grams of stuff is doable. Even 1200 maybe. But how many plants? How long veg? What is room conditions? etc etc etc.
Now i am currently week 7 of veg. I have heavily indica plants and topped+lst'd. They are 40cm height and 65cm wide now. Looks huge to me. But it's not really huge for yield. I mean, it looks really huge in your eyes but when you dry your stuff they are all gone.
You are looking for 700gr/m2? Then wish for no mold, pest, deficiency, excess, temperature issues and veg 8-10 weeks at least 6-7 plants (i don't know your tent but at least 5x5) with strong like like 1000w. Train them hard (top+lst). Fill every inch of your tent and with zero issues you can hit 700gr for sure.
But single mistake takes something from your final yield. Every ducking time
Look how big those plants. GG#4 and 7 week veg. I don't expect 700 grams here. Maybe around 500-600. Ofcourse if i don't get any issues during flowering.