👴📜🧮

#abacus #historical calculator #ancient calculation #traditional math #soroban #suanpan #old tool #manual math

📜🧮

#abacus #ancient calculation #historical tool #old math #soroban

ΑΒΓ=123

#gematria #isopsephy #greek numerology #letter number system #ancient calculation #classical studies

🪱X+X+I=21

#xxi #twenty-one #ancient calculation