Question

Explain any two device using during ancient time for calculation

Answer 1

abacus is used
mark as brainliest

Answer 2

The Abacus
There is a long history detailing the invention of computing and calculating machines. The earliest recorded calculating device is the abacus. Used as a simple computing device for performing arithmetic, the abacus most likely appeared first in Babylonia (now Iraq) over 5000 years ago. Its more familiar form today is derived from the Chinese version pictured below.
The abacus is more of a counting device than a true calculator. (See Figure 1.) Nonetheless, it was used for centuries as a reliable means for doing additions and subtractions.
Al-Khwarizmi
Most of the details about the life of the eminent mathematician Abu Ja’far Muhammad ibn Musa al-Khwarizmi are not known. (See Figure 2.) We do know that he was born around 780 in Baghdad and died about 850. Al-Khwarizimi was one of the more famous scholars at the House of Wisdom in Baghdad, the first major library since the Alexandria.
In one of his most famous works, al-Khwarizimi offered geometrical demonstrations or numerical proofs that were heretofore unknown to Europeans. The book contained the word "al-jabr" in the title, which meant "transposition." Subsequently, Europeans dubbed this new way of thinking about arithmetic "algebra."
For our purposes, though, it is his Latin name--"Algoritmi"--that is most significant for the history of computing. It became synonymous for a new style of reasoning called an "algorithm." This denotes an intelligible step-by-step process devised to solve some mathematical problem. Thus, the connection between the concepts of calculation and mechanism is indelibly forged.