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+<!DOCTYPE html>
+<html lang="en">
+  <head>
+    <meta charset="UTF-8" />
+    <title>Formula App</title>
+    <link
+      href="https://unpkg.com/tailwindcss@2.2.19/dist/tailwind.min.css"
+      rel="stylesheet"
+    />
+  </head>
+  <body>
+    <div class="container mx-auto p-4">
+      <h1 class="text-3xl font-bold">Formula App</h1>
+      <p class="text-gray-500">
+        Enter your values below to use the formulas.
+      </p>
+      <form class="flex flex-col gap-y-4">
+        <div class="flex flex-col gap-y-2">
+          <label for="units" class="text-gray-700">Number of units:</label>
+          <input
+            type="number"
+            id="units"
+            class="rounded-md border-gray-300 focus:border-blue-500 focus:ring-blue-500 px-4 py-2"
+          />
+        </div>
+        <div class="flex flex-col gap-y-2">
+          <label for="period" class="text-gray-700">Duration of period:</label>
+          <input
+            type="number"
+            id="period"
+            class="rounded-md border-gray-300 focus:border-blue-500 focus:ring-blue-500 px-4 py-2"
+          />
+        </div>
+        <div class="flex flex-col gap-y-2">
+          <label for="consumption" class="text-gray-700">Average consumption:</label>
+          <input
+            type="number"
+            id="consumption"
+            class="rounded-md border-gray-300 focus:border-blue-500 focus:ring-blue-500 px-4 py-2"
+          />
+        </div>
+        <button
+          type="submit"
+          class="bg-blue-500 hover:bg-blue-700 text-white px-4 py-2 rounded-md"
+        >
+          Calculate
+        </button>
+      </form>
+      <div class="mt-4">
+        <h2 class="text-2xl font-bold">Results:</h2>
+        <ul class="list-disc list-inside">
+          <li>Water subscription: 10,000</li>
+          <li>Sewage subscription: 10,000</li>
+          <li>Water bill: 82,250</li>
+          <li>Legal costs: 36,000</li>
+          <li>Consumption management reward: 98,000</li>
+        </ul>
+      </div>
+    </div>
+  </body>
+</html>
