From 45ceb387ea9d50f1d26355a9070112b005d47e74 Mon Sep 17 00:00:00 2001
From: Marcel Meyer <mm.marcelmeyer@gmail.com>
Date: Tue, 23 Jul 2024 16:10:30 +0200
Subject: [PATCH] Replace calculation with modulo

---
 cont/check_digit.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/cont/check_digit.go b/cont/check_digit.go
index b1d5451..1f64cec 100644
--- a/cont/check_digit.go
+++ b/cont/check_digit.go
@@ -16,7 +16,7 @@ func CalcCheckDigit(ownerCode string, equipCatID rune, serialNum int) int {
 		d *= 2
 		divider /= 10
 	}
-	return n - (n/11)*11
+	return n % 11
 }
 
 // charValue returns the index of character plus 10.