P = 7.3n + r,

Explanation:
Let us take the number of teams be n.
Quantity of salts shares each team = 7.3 grams
Quantity of salts shares by n teams = 7.3 × n = 7.3n
There is no salts remind(r) after sharing equally.
By division algorithm, we can write the equation
P = 7.3n + r
P = 7.3n + 0

Equation using whole number is
.