"Not all of us are good at maths... Especially not mental arithmetic! The computer can do that for us. So, wherever you can enter a number, you should be able to enter a sum, and get the result!"
Implies:
- Being able to type 4*5 and the input box interpretting that as 20
Notes:
- Blender has this
- So does Gimp, but apparantly here it was hell to debug and make safe.