from random import randint

a = [[randint(1,10) for i in range(10)] for i in range(5)] # создаём матрицу 5x10

[print(*i) for i in a] # выводим

pr = 1

for i in range(len(a)): # считаем произведение элементов

for ii in a[i]:

 pr *= ii

print(pr)