世界人口
= 300,000,000 (90% of the US population) and = 30 then "Degrees of Separation" = 19.5 / 3.4 = 5.7 and if = 6,000,000,000 (90% of the World population) and = 30 then "Degrees of Separation" = 22.5 / 3.4 = 6.6.