Вычисли удобным способом значение произведения 5×90×2, 3×50×9×2, 2×40×5, 2×6×7×50, 25×7×4×9, 4×8×25×3, 3×2×500×7, 50×6×7×20.

5*90*2=9003*50*9*2=27002*40*5=4002*6*7*50=420025*7*4*9=63004*8*25*3=24003*2*500*7=2100050*6*7*20=42000