Kuwerengera
Qalculate! ndi chowerengera chamitundumitundu chamitundu yosiyanasiyana. Ndi yosavuta kugwiritsa ntchito koma imapereka mphamvu ndi kusinthasintha zomwe nthawi zambiri zimasungidwa pamaphukusi ovuta a masamu, komanso zida zothandiza pa zosowa za tsiku ndi tsiku (monga kusintha ndalama ndi kuwerengera peresenti). …