Recipe Scaler — paste any recipe, change servings, get every ingredient auto-scaled

A practical recipe scaler for the situation every home cook hits at least once a month: the recipe is written for 4 people but you're cooking for 2, or for 6, or for one. Paste any ingredient list, type the original servings and the target servings, and every quantity is re-computed at once with the right unit kept on the right line. Parses real-world recipe text — "300 g 面粉", "1 1/2 cups flour", "2 tbsp olive oil", "1/2 tsp salt", "2 个鸡蛋" — and understands the formats home cooks actually paste: integers, decimals, mixed fractions like 1 1/4, and the unicode fractions ½ ⅓ ⅔ ¼ ¾ ⅛ that most converters silently drop. Eggs, slices, cloves, and other countable items are rounded to whole numbers so you don't end up with "1.33 eggs". Quantities are pretty-printed back as fractions when the result lands on a clean ½ / ⅓ / ¼ — keeps the page readable and grocery-list friendly. Lines without a number (the prose steps, "salt to taste", "pinch of pepper", "热水适量") pass through untouched. Time and temperature lines aren't touched either — because halving a recipe doesn't halve the oven temperature, and the bake time only nudges. A tip strip at the top spells that out. 100% client-side, no upload, no signup, no API call — paste, type two numbers, copy the scaled list back into your notes app.