Π 计算数字积Calculate Digit Product
计算整数各位数字的乘积（可忽略 0）。本地处理。可设置「忽略 0」。Product of the decimal digits of an integer (optionally ignoring zeros). Processed locally. Settings: Skip zeros.
使用说明与常见问题How-to & FAQ
「计算数字积」是什么？What is the Calculate Digit Product tool?
计算整数各位数字的乘积（可忽略 0）。本地处理。可设置「忽略 0」。Product of the decimal digits of an integer (optionally ignoring zeros). Processed locally. Settings: Skip zeros.
如何使用「计算数字积」？How do I use the Calculate Digit Product tool?
在「计算数字积」中，把内容粘贴或输入到上方输入框，结果会实时显示在下方，点击「复制结果」即可复制。例如输入「23」，得到「6」。In the Calculate Digit Product: Paste or type into the input box; the result appears below instantly — click "Copy result" to copy it. Example: "23" → "6".
符号和大整数怎么处理？How are signs and big integers handled?
只看各位数字：正号、负号都不参与乘积（+7 和 -7 都得 7）。整数按数字串逐位处理，用大整数（BigInt）相乘，不经过浮点，所以任意长的整数（最多 10000 位）都精确。Only the digits count: a plus or minus sign doesn't affect the product (+7 and -7 both give 7). The integer is processed digit by digit as text and multiplied with big integers (BigInt), with no floating point, so integers of any length up to 10,000 digits are exact.
勾选「忽略 0」后输入 0 会怎样？What if Skip zeros is on and the input is 0?
去掉所有 0 后没有数字，空乘积按惯例是 1，页面会在结果下方注明。With every 0 removed there are no digits left; by convention the empty product is 1, and a note below the result says so.
输入和输出是什么样的？What does the input and output look like?
例如在「计算数字积」中输入 23，输出为：6。For example, the Calculate Digit Product turns the input 23 into: 6.
有哪些选项可以调整？What options can I adjust?
「计算数字积」的设置：可勾选：「忽略 0」。每次生成结果都按当前设置处理。Settings in the Calculate Digit Product — tick boxes: "Skip zeros". The result always uses the current settings.
「计算数字积」免费吗？需要注册吗？Is the Calculate Digit Product free? Do I need an account?
「计算数字积」完全免费，无需注册或安装，打开网页即可使用，手机和电脑都能用；输入的内容只在你的浏览器本地处理。The Calculate Digit Product is completely free with no sign-up or install and works on phones and desktops; what you enter is processed only in your browser.