在计算总成本时，我们需要将单位成本乘以乘数。

To calculate the total cost, we need to multiply the unit cost by the ___multiplier.

这种营销策略是销量的倍增器，能带来更大的利润。

This marketing strategy acts as a ___multiplier for sales, leading to greater profits.

这个数字信号处理器内置了一个高效的乘法器单元。

The digital signal processor has an efficient ___multiplier unit built-in.