Where does “вычисляться” come from?

вычисляться (Russian) comes from Russian вычислять, from Russian вы́числить, from Russian чи́слить, from Russian число́, from Old East Slavic число, from Proto-Slavic čislo, from Proto-Slavic čisti, from Proto-Balto-Slavic (s)keistéi — to notice; to read.

Ancestry of “вычисляться”, step by step

StepLanguageWordMeaning
1Russianвычислятьto compute; to calculate; to evaluate, to weigh
2Russianвы́числитьto compute
3Russianчи́слитьto count
4Russianчисло́number; count; number
5Old East Slavicчисло
6Proto-Slavicčislonumber
7Proto-Slavicčistito read; to honour
8Proto-Balto-Slavic(s)keistéi
9Proto-Indo-European*(s)kʷéyt-t ~ *(s)kit-ént
10Proto-Indo-Europeankʷeyt-to notice; to read
Every word from Proto-Indo-European kʷeyt-Every word from Proto-Indo-European *(s)kʷéyt-t ~ *(s)kit-éntEvery word from Proto-Balto-Slavic (s)keistéi