Original: A pound of dry saffron requires 50,000–75,000 flowers, the equivalent of a football field's area of cultivation (110,000-170,000 flowers or two football fields for a kilogram)... Some forty hours of labour are needed to pick 150,000 flowers.
Simplified: These flowers would need about a football field's area of cultivation... Some forty hours of labour are needed to pick 150,000 flowers.