A clone chip becomes a genome map only through checked 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
Clone chips are physical address grids
12 rows and 8 columns give 96 available addresses.
12×8=96
A selected subset carries the toy map
10 clones at 300 bases each carry 3000 mapped bases.