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One cosy afternoon, two siblings, aged 5 and 7, were playing with numbers at the dining table, when the younger one asked, "Do you want to supercharge your brain with me?" The older one, intrigued, nodded, and they both started their little game-one with a calculator, and the other with an abacus.
As part of their game, the 7-year-old typed a tricky sum into the calculator:
"5783 × 46 = ?"
With a few quick taps, the answer appeared on the screen. But before they could even say it out loud, the 5-year-old, moving their fingers as if shifting invisible beads, blurted out the correct answer at the exact same time!
The older sibling's jaw dropped. "How did you do that?" they asked, completely stunned. With a proud smile, the 5-year-old replied, "It's the magic of the abacus! It helps me supercharge my brain!"