multiplier
noun
uk/ˈmʌltiplaɪər/ us [ C ]
a number used to multiply another number. A multiplier is often used to calculate things such as tax or pension payments:
If you currently receive a $360 monthly pension and the multiplier goes to 2%, then your pension will increase to $400.
[ S ] ECONOMICS
spending on one product or service that causes people and organizations to spend on other things as a result:
House sales have a multiplier effect on the economy.