diff --git a/src/Entry.ts b/src/Entry.ts
index c590ec9..ffbc044 100644
--- a/src/Entry.ts
+++ b/src/Entry.ts
@@ -300,6 +300,9 @@ export class Entry {
 
 
     /* 계산 */
+    angle(n: number) {
+        return n
+    }
     calc_basic(
         a: number,
         op: "PLUS" | "MINUS" | "MULTI" | "DIVIDE",