<math>L = \frac{1.000.000}{2500 \times 4 \times 12} = 8,3\ Jahre</math>
L = 1 , 000 , 000 2 , 500 × 4 × 12 = 8.3 y e a r s {\displaystyle L={\frac {1,000,000}{2,500\times 4\times 12}}=8.3\ years}