Try Amazon or eBay. You can also download software that will allow you to calculate using Chinese characters.
ancient as in the Chinese calculator that uses beads, or as in the first electronic computer, Eniac?
Chinese numeral characters, which are part of the written Chinese language, are still in use. Arabic numerals are also widely used in China.
The Chinese.
Chinese, Japanese and Korean all use Chinese characters for words, but each of these languages use them a bit differently. All three of these languages also can use Arabic numerals or Chinese characters to write numbers. Korean and Japanese languages share many commonalities in grammar and structure. Although Korean and Japanese use a lot of Chinese characters in writing, these two languages are drastically different from Chinese.
An abacus is an ancient Chinese calculator that is still in use today.
Chinese calculator
There was no zero in ancient Chinese numerals. The ancient Chinese number system was not a positional system, so there was no need for a zero.
Chinese characters were developed from pictures!
The number 18 may be written either using Arabic numerals (18) or Chinese characters (十八), but both are pronounced as "juuhachi".
It is 零 or 〇.
It is called an Abacus
The Chinese invention that was the first calculator was called an abacus. It was invented sometime between 2700 and 2300 BC.