You can increase cluster density by increasing the loading concentration.
In my post they are paired end reads so double that if you where doing single end reads. Here is a link how many reads you should expect for various MiSeq kits but it is dependent on cluster density.
https://www.illumina.com/systems/seq...fications.html
Edit. Sometimes you hear the word cluster and reads used together. I believe that for a v3 kit, it can generate around 25M unique cluster and each cluster can do two reads for paired end so it would output 50 M reads