diff --git "a/suyeun84/202509/27 PGM LV2 \353\251\200\354\251\241\355\225\234 \354\202\254\352\260\201\355\230\225.md" "b/suyeun84/202509/27 PGM LV2 \353\251\200\354\251\241\355\225\234 \354\202\254\352\260\201\355\230\225.md"
new file mode 100644
index 00000000..1043f3de
--- /dev/null
+++ "b/suyeun84/202509/27 PGM LV2 \353\251\200\354\251\241\355\225\234 \354\202\254\352\260\201\355\230\225.md"	
@@ -0,0 +1,22 @@
+```java
+class Solution {
+	public long solution(int w, int h) {
+		long answer = (long)w * (long)h;
+        
+		long wl = (long)w / gcd(w, h);
+		long hl = (long)h / gcd(w, h);
+		
+		answer -= (wl + hl - 1) * gcd(w, h); 
+		
+		return answer;
+	}
+
+	//최대 공약수 (유클리드 호제법)
+	private static long gcd(long w, long h) {
+		if(h == 0) {
+			return w;
+		}
+		return gcd(h, w % h);
+	}
+}
+```