Fills in the correct answer (does not auto-submit)
// ==UserScript==
// @name Potato Counter
// @namespace neopets
// @version 0.1
// @description Fills in the correct answer (does not auto-submit)
// @author You
// @match http://www.neopets.com/medieval/potatocounter.phtml
// @grant none
// ==/UserScript==
// If you encounter a long wall of potatoes (>1000 potatoes) you are strongly advised to NOT solve it. Refresh for a new potato count or simply submit a wrong answer.
var amount = $("b:contains('How many potatoes')").parent().next().find("td:has(img)");
$("input[name='guess']").val(amount.length);