An Excel in his head

The exhibit talks until six in the morning. A cousin who runs a factory narrates his operation in numbers that never stop moving: this machine cost so many millions, we have ten, it burns so many liters per hour, the truck takes eight hours, so the load leaves at four ▸ 9:30, arithmetic done mid-sentence, finished before the listeners can even set up the calculation ▸ 10:08. The envy is specific: “tener como todo mi Excel, hermano, en la mente” ▸ 12:12. Give the man a price and he’s already told you whether the business works: fruit bought at this, sold at that, that’s a loss, next ▸ 12:50. Shark Tank investors impress him with fast math; the cousin, he estimates, runs ten times faster ▸ 13:33, at 3 a.m., on a Red Bull.

la viabilidad de un negocio se calcula a la velocidad de tu aritmética →

Whether the skill was born or practiced into him, its value is obvious: the speed of your arithmetic is the speed at which you can evaluate opportunities, and evaluation speed compounds like nothing else. Which is why the night doubles as validation for the estimation app ▸ 14:17, which now has a mockup and a name: Roughly, “como medianamente, más o menos” ▸ 14:35. The loop stays as designed: 49 × 21, answer “1000” in seconds and score by closeness ▸ 15:02; root of 81, land near nine instead of fifty, because a person whose guesses land near the truth understands how things behave before anyone finishes explaining them ▸ 15:42. The app stays in standby, announced as advertisement to the void ▸ 16:04, but the spec now has a living benchmark: be the training montage whose final form is the cousin…