Pairings - (Hermione/George), (Harry/Ginny).
1st Part:- 1-4 Year
The Arthimancer - 84 chapters (Complete) 529k Words
Summary: Hermione grows up as a maths whiz instead of a bookworm and tests into Arithmancy in her first year. With the help of her friends and Professor Vector, she puts her superhuman spell crafting skills to good use in the fight against Voldemort.
2nd Part :- 5-7 Year
Lady Archimedes - 82 Chapters (Complete) 597k Words
Summary: Sequel to The Arithmancer. Years 5-7. Armed with a N.E.W.T. in Arithmancy after Voldemort's return, Hermione takes spellcrafting to new heights and must push the bounds of magic itself to help Harry defeat his enemy once and for all.
3rd Part :- Post Hogwarts
Annals of Arithmancy - 24 Chapters (complete)
155k Words
Summary: Hermione won the war, but her career as the world's greatest arithmancer is just beginning. Now, she has places to go, spells to invent, and a family to start. Oh, and a whole lot of dementors to kill.
(Link: https://m.fanfiction.net/s/10070079/1/The-Arithmancer
https://m.fanfiction.net/s/11463030/1/Lady-Archimedes
https://m.fanfiction.net/s/13001252/1/Annals-of-Arithmancy)