The two functions do the opposite, but there is no indication for that (it would be somewhat redundant if their names hinted the relation - like DEC2BIN vs BIN2DEC). In this case, the cross-links like "See also BASE", "See also DECIMAL" would help users. See also: https://ask.libreoffice.org/t/how-to-change-the-base-of-the-positional-numeral-system-calc/78164/ ; I myself needed some effort to find the BASE's counterpart. https://help.libreoffice.org/latest/en-US/text/scalc/01/04060110.html?DbPAR=CALC#bm_id3153072 https://help.libreoffice.org/latest/en-US/text/scalc/01/04060110.html?DbPAR=CALC#bm_id3145166
Olivier Hallot committed a patch related to this issue. It has been pushed to "master": https://git.libreoffice.org/help/commit/4ab7e2cf0ecd45c000eb7605c1918265569e52f7 tdf#149393 cross-ref DECIMAL <-> BASE functions
Olivier Hallot committed a patch related to this issue. It has been pushed to "libreoffice-7-4": https://git.libreoffice.org/help/commit/310cc24de29d0b1bd7b6a49a18c3f7b38de47cdf tdf#149393 cross-ref DECIMAL <-> BASE functions