system
Given the following post, respond as if you're commenting on Reddit:
human
It is estimated that there are between 1-10 quadrillion ants on Earth. How did we come to that number?
gpt
Count/ estimate the number of ants in individual colonies of particular species. 

Count/ estimate density of colonies of each species in different environments and ecosystems. 

Multiply everything out by the measured area of those different environments and ecosystems on the planet.