d, _ := decimal.New(0, 0).SetString("1.45")
fmt.Println(d.Round(2)) -> Expect: 1.5 actual: 1.4

d, _ := decimal.New(0, 0).SetString("1.5")
fmt.Println(d.Round(1)) -> Expect: 2 actual: 2 (seems not consistent with the above case)

d, _ := decimal.New(0, 0).SetString("1.451")
fmt.Println(d.Round(2)) -> Expect: 1.5 actual: 1.5 (correct)