$\begin{aligned}&3.14 + 64.8×0.537×25 + 5.37×6.48×75 - 8×64.8×0.125×53.7\\=&3.14 + 64.8×0.537×25 + 64.8×0.537×75 - 64.8×53.7\\=&3.14 + 64.8×0.537×(25 + 75) - 64.8×53.7\\=&3.14 + 64.8×0.537×100 - 64.8×53.7\\=&3.14 + 64.8×53.7 - 64.8×53.7\\=&3.14\end{aligned}$
