In the CalcAllFitness routine, we determine the fitness of each chromo in the cell. Fitness is simply how close the value of a formula is to the desired value.
First, we decode the chromosome into it's genes. We convert those bit pattern groupings into numbers which represent the values in our formula.
Second, we plug those values into the equation to get the value of the whole equation.
Finally, we determine fitness by how close our current equation's value is to the goal
state we've set for the equation. In this case 25245 is pretty dang far from, say
52. (That's assuming 52 is the magic number you're trying to solve for.)