提供一个数字列表和一个数字，编写代码以查找数字列表中最接近该数字的数。 
数字列表：[7, 14, 20, 25, 30] 
目标数字：22
代码示例：

```
def find_closest_number(number_list, target_number):
    closest_number = None
    closest_distance = float('inf')
    for number in number_list:
        distance = abs(number - target_number)
        if distance < closest_distance:
            closest_distance = distance
            closest_number = number
    return closest_number
    
number_list = [7, 14, 20, 25, 30]
target_number = 22
closest_number = find_closest_number(number_list, target_number)
print(closest_number)
```

输出结果为 `20`。