>>628
>>629
3.7×2.33 + 7.4 × 1.32 + 1.11 × 1.01 =3.7(2.33+2.64+0.303)
=3.7×5.273
=15.819+3.5+0.14+0.049+0.0021
=19.459+0.0021
=19.4611