fix: 替换四六舍入为四五舍入

web/calculators/__init__.py

@@ -1,4 +1,4 @@
-from decimal import Decimal
+from decimal import Decimal, ROUND_HALF_UP
 
 from commons.models.data_fujian import DataFujian
 from commons.models.data_network import DataNetwork
@@ -37,7 +37,8 @@ class Helper:
 class RoundMethod:
     @staticmethod
     def normal(n, round_bit):
-        result = round(n, round_bit)
+        q_ext = Decimal('0.' + '0' * round_bit)
+        result = Decimal(n).quantize(q_ext, rounding=ROUND_HALF_UP)
         return result if round_bit != 0 else int(result)
 
     @staticmethod