diff --git a/src/tools/math.py b/src/tools/math.py
index 6a58baf..43553b2 100644
--- a/src/tools/math.py
+++ b/src/tools/math.py
@@ -26,3 +26,7 @@ def mul(ints: Iterable[int]) -> int:
         ret *= x
 
     return ret
+
+
+def magnitude(value: int | float) -> int:
+    return math.floor(math.log10(value))