Add numberOfBoomerangs function

Implement function to calculate number of boomerangs based on given points.

Author: jyoung2419

leetcode3/정진영/447. Number of Boomerangs

@@ -0,0 +1,19 @@
+/**
+ * @param {number[][]} points
+ * @return {number}
+ */
+var numberOfBoomerangs = function(points) {
+
+    for (let i = 0; i < points.length; i++){
+        for (let j = 0; j<points.length; j++){
+            let x1 = points[i][0];
+            let y1 = points[i][1];
+
+            let x2 = points[j][0];
+            let y2 = points[j][1];
+
+            let dis = (x2-x1)**2 + (y2-y1)**2;
+        }
+    }
+
+};