Ответ:

a) (0.25 * 4)^7 = 1^7 = 1

б) (0.02 * 50)^13 = 1^13 = 1

в) (0.125 * 0.8)^3 = 0.1^3 = 0.001

г) (400 * 0.025)^4 = 10^4 = 10000