Sajahar, you most definitely have a distinct maths talent! You really ought to 'exploit' it! ( know you help people with their electricity bills!).
Two thoughts - training as a book-keeper. A friend of mine does this, and has small business or self-employed clients she does the books for. Possibly if you do it by 'personal agreement' so to speak, you don't even need formal qualitifications, just the ability to get the costs and turnover right, and the calculations to go with it! You could probably help people with their self-employed tax returns too!!!
The other thought is to work with children. As you'll know, maths teachers are like hens teeth, especially in primary schools (most maths graduates tend, - if they're not heading for the City! - naturally, to head for secondary schools so they can enjoy teaching calculus etc to six formers!). But it's primary school age children who need the kind of practical every-day maths grounding. I wonder if local schools near you have 'maths clubs' where you could volunteer (not sure if payment would be funded!) to help children with their sums.
Please don't 'diss' your gift by thinking little of it. SO MANY people find maths terrifying - they have whatever the numbers equivalent of dyslexia is! - and someone like you could really help them.
Do other folks here have good ideas for Sajahar (and not just as their Electricity Bill Consultant!!!!
They need me more than I need them. 
