Tim Berners-Lee and Robert Cailliau in 1989-1990.
There are two. One is in Bourneville, Birmingham, UK and is the original factory. There is another Cadbury World in Dunedin, New Zealand. There are other factories around the world which allow...
4 ft X 7 ft is 28 sq ft but X 3 ft gives you 84 CUBIC ft
90,000 ft² = 2.06611 acres.