Is 286 an idiom?

286 is not an idiom. 286 is 2×8= 16, which is the multiplication formula. Idiom is a part of stereotyped phrases or short sentences in China's Chinese vocabulary. Idiom is a major feature of China culture. It has a fixed structure and a fixed sentence, which expresses a certain meaning and is used as a whole in the sentence. Therefore, 286 does not conform to the concept of idioms, and it is not an idiom.