A \(68 \mathrm{~kg}\) runner runs a marathon \((42.2 \mathrm{~km})\) at a pace of \(15 \mathrm{~km} / \mathrm{h}\). To expend the same number of Calories as she did in running this race, how many \(2.7-\mathrm{m}\)-high flights of stairs would she need to climb?