Add surface area of torus algorithm

Maths/SurfaceAreaOfTorus.js

@@ -0,0 +1,18 @@
+/**
+ * Surface Area of a Torus
+ * Reference: https://en.wikipedia.org/wiki/Torus
+ *
+ * Formula:
+ * A = 4 * π² * R * r
+ *
+ * @param {number} majorRadius - Distance from the center of the tube to the center of the torus (R)
+ * @param {number} minorRadius - Radius of the tube (r)
+ * @returns {number} Surface area of the torus
+ */
+export function surfaceAreaOfTorus(majorRadius, minorRadius) {
+  if (majorRadius < 0 || minorRadius < 0) {
+    throw new Error("Radii must be non-negative");
+  }
+
+  return 4 * Math.PI ** 2 * majorRadius * minorRadius;
+}