在这个数学问题中，两个乘数分别是5和7。

In this math problem, the two ___multipliers are 5 and 7.

好的教育体系是经济发展的倍增器。

A strong education system serves as a ___multiplier for economic growth.

经济学家计算了基础设施投资对GDP的乘数效应。

Economists calculated the GDP ___multipliers from infrastructure investments.