 
 (P.S. I am just a newcomer to factorio, so if you don't mind, try to explain everything to where I can understand it.)
 
  when you have like 16 science labs running full speed, and need a massive capsule building facility because your pollution has pissed aliens a lot and they have these huge bases, and you have to expand because the tiny ore patches you have at starting point won't be enough, and so on.
 when you have like 16 science labs running full speed, and need a massive capsule building facility because your pollution has pissed aliens a lot and they have these huge bases, and you have to expand because the tiny ore patches you have at starting point won't be enough, and so on.


 I usually make 40 smelters for copper ore and iron ore as a starting point, 10 per output belt with four belts carrying iron plate.
 I usually make 40 smelters for copper ore and iron ore as a starting point, 10 per output belt with four belts carrying iron plate. 
 They really suck up electricity.
  They really suck up electricity.