Description of problem:
I'm creating a pod with following limits:

apiVersion: v1
kind: Pod
metadata:
  name: pod-with-resources
spec:
  containers:
  - capabilities: {}
    image: gcr.io/google_containers/serve_hostname
    imagePullPolicy: IfNotPresent
    name: kubernetes-serve-hostname
    resources:
      limits:
        cpu: 30mi
        memory: 150Mi

I'm getting an error saying:

Error from server: error when creating "pod.yaml": pods "pod-with-resources" is forbidden: [Minimum cpu usage per Pod is 30m, but request is 17m., Minimum memory usage per Pod is 150Mi, but request is 94371840., Minimum memory usage per Container is 150Mi, but request is 90Mi., Minimum cpu usage per Container is 30m, but request is 17m.]

Where does 90Mi (for memory) or 17m (for cpu) gets from?

After digging a while I found the memory limit has to be 60% of what I've specified and that value must be above that minimum (here 150Mi). So to fit into that limit I need to do 150/.6=250 with that I'm still getting error,
but this time regarding just cpu. Increasing it doesn't change the error message. After another series of tinkering I found that it has to be 200% of memory limit and additionally you need to take 6% of it to be above the min
limit.

This is all nice and fancy, but me as a regular user, where do I get those values from? How I know those calculations? These are hard, not easily understandable.