愚痴(保守)

https://help.libreoffice.org/Calc/Mathematical_Functions#QUOTIENT
http://cgit.freedesktop.org/libreoffice/core/tree/scaddins/source/analysis/analysis.cxx#n671

http://docs.libreoffice.org/sc/html/interpr5_8cxx_source.html#l01593
http://www.cplusplus.com/reference/cmath/pow/