Final answer:
The equation is T = g * n * 190, where T represents the total calories consumed, g is the number of advisories, and n is the number of students per advisory.
Step-by-step explanation:
To calculate the total calories consumed, we need to know the number of advisories (g) and the number of students per advisory (n). Let T represent the total calories consumed. Since each person has one doughnut during advisory and each doughnut contains 190 calories, the equation can be written as:
T = g * n * 190
This equation multiplies the number of advisories (g) by the number of students per advisory (n) and then multiplies the result by 190 calories, giving us the total calories consumed.