exeunt-pursued-by-a-bear:a-mini-a-day:300-year-old Chinese abacus ring was used during the Qing Dyna
exeunt-pursued-by-a-bear:a-mini-a-day:300-year-old Chinese abacus ring was used during the Qing Dynasty to help traders.Source.[18th century Chinese teenager voice] Haha and teachers said we wouldn’t have a calculator with us everywhere we go -- source link