vintage abacus on smudged blackboard background

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Size: 5924px × 3949px
Photo credit: © Yury Zap / Alamy / Afripics
License: Royalty Free
Model Released: No

Keywords: abacus, ancient, background, blackboard, blank, calculator, chalkboard, dark, device, education, finance, math, mathematics, object, simple, smudge, table, tool, vintage, wooden