According to your source the ld50 for nicotine is 6 mg/kg. Although the dosage taken is relatively low, nicotine is still way more toxic than most things people consume on purpose.
360 mg / 6 = 18, less than 1 pack has a lethal dose of nicotine. However, since uptake by the body is low for nicotine, smoking what would seem to be a lethal amount doesn't kill people.
https://www.webmd.com/smoking-cessation/nicotine-poisoning-c...