Question 53267
(4xy^3)(2xy^2y)(5xy^2) 
1st multiply the numbers to get 4*2*5=40
2nd multiply the "x" factors: x*x*x=x^3
3rd multiply the "y" factors: y^3 * y^2*y *y^2= y^8
Final Answer: 40x^3y^8
Cheers,
Stan H.