How to color highlight with Google Sheets Conditional Formatting?

Question

Spreadsheets

There is a table for recording clients in a beauty studio. It is necessary that when choosing a procedure, a sufficient amount of time is allocated in the corresponding office (several lines are highlighted at once). For example, a massage lasts 45 minutes, which means that 3 lines are allocated at once (15 minutes = 1 line). I know how to select one line, but it doesn’t work here ...
An example of how it should be: