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The corrected calculation would lead to ~31 sunflowers per liter.

ChatGPT 3.5 thinks that about 2.2 to 3.6 sunflower heads are enough. I highly doubt it.

According to this website [1], you'd need about 170 sunflowers on average.

That site reads like it's generated from a search query. It has multiple, wildly different answers:

> In general, you will need to use about 100g of sunflower seeds to make 1 litre of oil.

> It takes around 170,000 sunflower seeds to make one litre of oil.