Refs #25287 -- Added support for multiplying and dividing DurationField by scalar values on SQLite.

tests/expressions/tests.py

@@ -1530,6 +1530,36 @@ class FTimeDeltaTests(TestCase):
         ))
         self.assertIsNone(queryset.first().shifted)
 
+    def test_durationfield_multiply_divide(self):
+        Experiment.objects.update(scalar=2)
+        tests = [
+            (Decimal('2'), 2),
+            (F('scalar'), 2),
+            (2, 2),
+            (3.2, 3.2),
+        ]
+        for expr, scalar in tests:
+            with self.subTest(expr=expr):
+                qs = Experiment.objects.annotate(
+                    multiplied=ExpressionWrapper(
+                        expr * F('estimated_time'),
+                        output_field=DurationField(),
+                    ),
+                    divided=ExpressionWrapper(
+                        F('estimated_time') / expr,
+                        output_field=DurationField(),
+                    ),
+                )
+                for experiment in qs:
+                    self.assertEqual(
+                        experiment.multiplied,
+                        experiment.estimated_time * scalar,
+                    )
+                    self.assertEqual(
+                        experiment.divided,
+                        experiment.estimated_time / scalar,
+                    )
+
     def test_duration_expressions(self):
         for delta in self.deltas:
             qs = Experiment.objects.annotate(duration=F('estimated_time') + delta)