From 2a2e4d693104726d40479f1a679e59b35b949ab7 Mon Sep 17 00:00:00 2001
From: tiennm99 <tiennm99@outlook.com>
Date: Sun, 30 Nov 2025 15:00:15 +0700
Subject: [PATCH] feat(go): 1a

---
 go/1A.go | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)
 create mode 100644 go/1A.go

diff --git a/go/1A.go b/go/1A.go
new file mode 100644
index 0000000..edb4867
--- /dev/null
+++ b/go/1A.go
@@ -0,0 +1,18 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+)
+
+func main() {
+	in := bufio.NewReader(os.Stdin)
+	var n, m, a int64
+	fmt.Fscan(in, &n, &m, &a)
+
+	tilesN := (n + a - 1) / a
+	tilesM := (m + a - 1) / a
+
+	fmt.Println(tilesN * tilesM)
+}