A toy genome-project pipeline combines coverage and chip address counts. Exact arithmetic here means exact results for the stated model inputs; measured inputs still carry uncertainty and significant-figure limits.
highlighted = computed this step
The pipeline still starts with coverage
Thirty reads of one hundred bases over a one thousand base toy genome gives coverage 3 times.
c=100030⋅100=3
Parallel slots are a separate count
The chip side has 20 address slots. Genome projects scale by repeated indexed physical measurements, not by one magic read.