Warning: Missing argument 3 for write(), called in /www/wwwroot/biwei1.cn/incs/robot.php on line 68 and defined in /www/wwwroot/biwei1.cn/incs/data.php on line 487 Archimedes, mathematicians, and 7th grade geometry teachers have known the truth about pizza sizes for centuries: a large pizza is almost always a better deal than two mediums and a 18" pizza has more pizza than two 12" pizzas