Calculate

Cantrip (divination; enhancement, law, technological)
Class(es): Sorcerer, warlock, wizard
Casting Time: 1 Action
Range: Self
Components: V, S
Duration: Concentration (1 hour)

You instantly know the answer to any mathematical equation that you speak aloud. The equation must be a problem that a creature with Intelligence 20 could solve using nonmagical tools with 1 hour of calculation. Additionally, you gain a knack die on Engineering checks made during the duration of the spell.