#(3x^3y^4)(2x^2y^6)#
# = 3 * x^3 * y^4 * 2 * x^2 * y^6 #
# = 3 * 2 * color(blue)( x^3 * x^2) * color(green)( y^4 * y^6 #
# = 6 * color(blue)( x^3 * x^2) * color(green)( y^4 * y^6 #
As per property:
#color(blue)(a^m * a^n = a^(m+n)# , applying the above to exponents of #x# and #y#.
# = 6 * color(blue)( x^(3 +2)) * color(green)( y^(4 +6) #
# = 6 * color(blue)( x^5 * color(green)( y^10 #
# = 6 color(blue)( x^5 color(green)( y^10 #