COMMENT Effective communication means, among other things, being precise. Especially with figures. Within limits, of course. In ordinary instances, it is most times unnecessary to go to more than one or two decimal places.

Being precise saves everyone time. It forestalls mis-communications or misunderstandings.

In engineering, it saves money. And possibly human lives as well. For example, precision engineering in the design and manufacture of internal combustion engines means less fuel used and more power generated. With capsule-transporting rockets, it means near-absent chances of fatal accidents.