Can I multiply the ? by the 4 just to save myself some time?

我先算?乘以4吧,这样省事儿

耶鲁公开课 - 博弈论课程节选

To get any location in memory, to get to any value of the list, I simply have to say which element do I want to get, I know that these things are stored in a particular size multiply that index by 4, add it to start, and then it's in a constant amount of time I can go to that location and get out the cell.

取得列表中的任何一个值,简单说来，想要取得列表中的任何元素,我知道这些元素存在特定的大小中,把下标乘以4，加到start上,然后定位到内存单元，并取出值就是固定的时间了,好的，如果元素以固定大小存储。

麻省理工公开课 - 计算机科学及编程导论课程节选

And the strings seem to multiply with time.

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Although slow - the machine took up to 10 seconds to multiply two numbers - it proved very reliable and often cranked up 80 hours of running time in a week.

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If, for example, a company is caught only every fifth time it pollutes a river, then when it is caught a jury fixing damages should multiply the value of harm done by five.

ECONOMIST: Punitive damages