diff --git a/codewars/7kyu/largest-square-inside-a-circle/koronya.js b/codewars/7kyu/largest-square-inside-a-circle/koronya.js
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+++ b/codewars/7kyu/largest-square-inside-a-circle/koronya.js
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+// [JS][7kyu] Largest Square Inside A Circle
+// largest-square-inside-a-circle
+// https://www.codewars.com/kata/5887a6fe0cfe64850800161c/train/javascript
+
+const areaLargestSquare = (r) => 2 * r ** 2
+
+areaLargestSquare(5) === 50
+areaLargestSquare(7) === 98
+areaLargestSquare(15) === 450