Creativity seems to have no limits. Centuries later B decided to stop carrying pebbles and invented an easier way of counting: one sheep, two sheep, three sheep. Later, B decided to omit the repetitions (sheep, sheep, sheep). That is how B invented the numbers: one, two, three.
Creativity seems to have no limits. Centuries later C decided to arrange the numbers visually and the number line was born. Several hundred years before Christ, a Chinese (D) started arranging the numbers in two dimensions and the magic square was born. And people started playing with it.
Creativity seems to have no limits. 2 millennia passed. K decided to arrange the numbers of the magic square in three dimensions. Each cell in the square was given a height equal to the number in it. The magic squares started looking like projects in New York. K did not stop there. He saw that if it rained, in some projects the water would run off. Other projects would retain water. The concept of water retention was born. Now the question was, "How much water will project X retain?"
Creativity seems to have no limits and we can expect arrangements of numbers in 4, 5 and more dimensions, as well as inventions of other operations with numbers. Before those limitless possibilities start making our heads spinning, let us forget about number operations and think about water operations. We perform the same operations with water that A did tens of thousands of years ago: we look for it and find it, drink it and wash with it. On the one hand, we can keep it better than A could (in dams and bottles), but on the other, we spend more than A did. And most importantly, just like A we are unable to produce water (although we seem to know how). Creativity, no matter what we think of it, has its limits.