Hi click block to formuls

[lion77pnh]

Hi my formuls 90min/30 = 1 block 30 min.
My design teacher create lesson #1 = 90 minut duration
apprentice choice hower 3 block and add 3 block
1 block calendary - 30 min
how to 3 block dont 1 block.
My Task create 1 event 90 min and new user choice

[jungeun-cho]

The default creation time block is set at 30 minutes.
Customizing time blocks is not yet supported.
Considered in Calendar 2.0.