diff --git a/django/db/backends/utils.py b/django/db/backends/utils.py
index f4641e3db8..a574d64562 100644
--- a/django/db/backends/utils.py
+++ b/django/db/backends/utils.py
@@ -236,7 +236,7 @@ def format_number(value, max_digits, decimal_places):
         if max_digits is not None:
             context.prec = max_digits
         if decimal_places is not None:
-            value = value.quantize(decimal.Decimal(".1") ** decimal_places, context=context)
+            value = value.quantize(decimal.Decimal(1).scaleb(-decimal_places), context=context)
         else:
             context.traps[decimal.Rounded] = 1
             value = context.create_decimal(value)
diff --git a/django/forms/fields.py b/django/forms/fields.py
index 92a8f768c4..61f5ccfe58 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -360,7 +360,7 @@ class DecimalField(IntegerField):
             if self.decimal_places is not None:
                 # Use exponential notation for small values since they might
                 # be parsed as 0 otherwise. ref #20765
-                step = str(Decimal('1') / 10 ** self.decimal_places).lower()
+                step = str(Decimal(1).scaleb(-self.decimal_places)).lower()
             else:
                 step = 'any'
             attrs.setdefault('step', step)