> get total count of specific digit(0~9) from 1 to number

https://www.acmicpc.net/problem/14912

**Example**

```js
> getDigitTotal(10, 1)
> 2
// 1 = 1
// 2 = 0
// ...
// 10 = 1
```

```js
> getDigitTotal(11, 1)
> 4
// 1 = 1
// 2 = 0
// ...
// 10 = 1
// 11 = 2
```