2. Extended meaning: This person is stupid, brain-damaged, neurotic, and his words are inappropriate and derogatory.
"3" refers to the third party who interferes with others' love and marriage. In mathematics, 3 is a simple Arabic numeral.
The "4" operand represents the firmness of the substance, that is, the composition and structure of the substance. The number 4 always shows the characteristics of suffering, representing those aspects of life that make you feel limited and need to restrain yourself.
Numbers represent different meanings, and the multiple of four is the difference between two squares. 4x = y2- z2. Every four consecutive natural numbers multiplied by one must be equal to a square number. Sum of squares theorem: each natural number can be expressed as the sum of four square numbers at most.