So basically, it does take 282 years of her life force but only ages her by half which is the 141 years they mentioned. In our world, an average person's life span is about 70-80 but since they're living in a world with magic and all, I'm assuming they'd have about 100 or even more years but a Primera has double that amount of life span. The half amount of the number from the bracelet is something like a conversion to how much it affects her growth physically.
Woahhh thanks for the answer!!
No problem! It took me a while to understand the whole age thing too (≧▽≦)
Guys guys! I feel dumb about the bracelet. Why is it showing double of the real amount of life force? Like when it showed 282 yrs why they said 141 yrs? Maybe i missed the explanation while reading....?