![](http://www.alamy.com/thumbs/6/A08CEFAA-3117-4FF2-ADF7-FCC182532C2E/AYPMC0.jpg)
An abacus is placed on the papers with mathematical equations written on it
Size: 6373px × 4249px
Photo credit: © AllrightImages / Alamy / Afripics
License: Royalty Free
Model Released: No
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