能简算的要简算．

⑴3.4×12.5×0.15×8×2	⑵1.25×4.6×8	⑶3.14×9+3.14
⑷4.5×2.6+4.5×7.4	⑸125×0.74×0.08	⑹2.86×0.5×4.6．