Click the little video button thing to turn on/off your video. Click the chat to talk to Math Scratch Cat. The video takes a second to turn on. Press space key for a calculator. This is a whole number calculator. (Whole numbers include 0, 1, 2, 3, etc but no negative numbers, fractions, or decimals.) When Math Scratch Cat asks about the operations, don't add a space.
It's best if you're logged in with a username. Would you go to a Zoom meeting with your name as " "? Why does MSC love doughnuts (donuts) so much? Find out in the first Super Scratch game: https://scratch.mit.edu/projects/622038765/