feat: more styling, bug fixes, deleting rows, removing unnecessary features

src/utils.ts

@@ -1,3 +1,12 @@
 export function isPosInt(maybePosInt: number): boolean {
     return (maybePosInt | 0) === maybePosInt && maybePosInt > 0;
+}
+
+export function greatestCommonDivisor(a: number, b: number): number {
+    while (b !== 0) {
+        const temp = b;
+        b = a % b;
+        a = temp;
+    }
+    return a;
 }