Hi wio,
I add this feature on test Channel. Invite url: https://ifttt.com/features/redeem?code=7512-043c1082a388ea0fc2603bba547b5b60
Now only enable on Action/Drive any Grove.
How to use:
First character need “=”.
e.g.
={{Ingredient}} -15
Support operators: +, -, *, /, ().
Hope you like it. Any question let me know
Ten