Fill in the missing values for the given equation.
 
 -4p2q2×4 _____ \(=\) ______ p7q7.
 
Solution:
Product of variables in the left side must be the product of variables in the right side.
 
Product of the coefficient in the left side must be the product of the coefficients in the right side.
 
-4p2q2×4iiqi \(=\) p7q7.