Kaomojis
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#abacus
#historical calculator
#ancient calculation
#traditional math
#soroban
#suanpan
#old tool
#manual math
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#slide rule
#math tool
#lacinhcet
#historical calculator
#pre-digital
#analog device
#abacus #historical calculator #ancient calculation #traditional math #soroban #suanpan #old tool #manual math