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---
id: 5900f4931000cf542c50ffa5
title: 问题294数字总和-经验23
challengeType: 5
videoUrl: ''
---
# --description--
对于正整数k将dk定义为通常的十进制表示形式中k的位数之和。
因此d42= 4 + 2 = 6。
对于正整数n将Sn定义为具有以下属性的正整数k <10n的数量 k可被23整除 dk= 23。
给出S9= 263626和S42= 6377168878570056。
找到S1112并给出答案mod 109。
# --hints--
`euler294()`应该返回789184709。
```js
assert.strictEqual(euler294(), 789184709);
```
# --solutions--