规则Rules：
标准数独基础上，每个区域内，上方数字的乘积等于下方的多位数。
Classic rules applied. Additionally, in each zone, numbers above products to multi-digit numbers below.
◆例题 Example
◆在线涂鸦 Draw it Online
◆在线做 Do it by CTC
◆在线做 Do it by Penpa
