名詞 multiplication:

1. an arithmetic operation that is the inverse of division; the product of two numbers is computed
   同義詞：times
2. the act of producing offspring or multiplying by such production
   同義詞：generation, propagation
3. a multiplicative increase

1. Don't think you can learn grammatical rules like you learn multiplication tables.
   不能像記乘法表那樣記語(yǔ)法規(guī)則。
2. The multiplication of numbers have make our club building too small.
   會(huì)員的增加使得我們的俱樂(lè)部擁擠不堪。
3. Our teacher used to drum our multiplication tables into us.
   我們老師過(guò)去老是讓我們反覆背誦乘法表。
4. The multiplication of students has made our school too small.
   學(xué)生的增加使學(xué)校顯得擁擠。
5. My son began to study multiplication when he was six.
   我兒子六歲的時(shí)候開(kāi)始學(xué)習(xí)乘法。

mul.ti.pli.ca.tion

n.（名詞）
The act or process of multiplying or the condition of being multiplied.
增加：增加的行為或過(guò)程或者被增加的情況
Propagation of plants and animals; procreation.
繁殖：動(dòng)植物的繁殖；生殖
Mathematics
【數(shù)學(xué)】
The operation that, for integers, consists of adding a number (the multiplicand) to itself a certain number of times. The operation is extended to other real numbers according to the rules governing the multiplication of integers.
乘法運(yùn)算：對(duì)于整數(shù)，一個(gè)被乘數(shù)乘以一定倍數(shù)的乘數(shù)的運(yùn)算。根據(jù)整數(shù)乘法運(yùn)算法則，此種乘法運(yùn)算可運(yùn)用到其他實(shí)數(shù)
Any of certain analogous operations involving expressions other than real numbers.
涉及除了實(shí)數(shù)以外的表達(dá)式的任何相似的運(yùn)算

【引伸】
mul.tiplica.tional
adj.（形容詞）