multiply
verb [ I or T ] uk/ˈmʌl.tɪ.plaɪ/ us/ˈmʌl.tə.plaɪ/
大幅增加；乘，使相乘
to increase very much in number, or (in mathematics) to add a number to itself a particular number of times
In warm weather these germs multiply rapidly. 在温暖的天气里这些细菌会迅速繁殖。
If you multiply seven by 15 you get 105. 用15乘以7，结果是105。
Compare: adddivide verb (CALCULATE)subtract