On the off chance you haven&#x27;t heard of him, you might want to check out Daniel Tammet [1]. He&#x27;s a high-functioning savant who has number-related synesthesia, can do calculations by juxtaposing images as you describe, and he&#x27;s cultivated these abilities to the point that he can perform incredible feats of calculation and memorization.<p>[1] <a href="https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Daniel_Tammet" rel="nofollow">https:&#x2F;&#x2F;en.wikipedia.org&#x2F;wiki&#x2F;Daniel_Tammet</a>