在该两天工作，老板必须补假或补钱

To pay (salary/26) x 2.

那如果补leave呢？

It is OK.

那其实我们应该补几天才算正确

One day replacement.

​1）补钱 （salary/26)x2

2）补假（1天）​

员工的疑问就是为什么补钱就是乘2而补假只补1天？​

Give a call to the Labour Department and ask the officer why.

所谓补钱方式 salary/26x2 

​意思相等于3倍对吗？因为当个月薪水算在内了。​

Thank you.

but i will try refer to labour department. Cause if we choose to replace another 1 day the employee must feel unfair cause if choose payment they can entitle double paid but if choose replace day just entitle 1 day. or is it depends on act covered and without act covered?