Sharepoint list choice field calculated values help

Hello,

I have two choice column in my sharepoint list

1.) Type: type1,type2

2.)Subtype: subtype1.1, subtype1.2, subtype1.3, subtype2.1, subtype2.2, subtype2.3

What I need is when user selects 'Type1' in Type choice column, it should restrict the other Subtype choice column with  subtype1.1, subtype1.2, subtype1.3 and for Type2 selection it should be subtype2.1, subtype2.2, subtype2.3.

How can I achieve this ?