What do the loisels do in order to pay their debts?

To pay their debts, the Loisels, particularly Mathilde, take on a life of hardship and sacrifice after losing the borrowed necklace. They work for ten years in grueling jobs, living in poverty and cutting back on all luxuries. Their commitment to repay the debt transforms their lives, ultimately leading to a harsh reality that contrasts sharply with Mathilde's previous dreams of wealth and status. This experience profoundly changes their understanding of value and happiness.