вычисли 645000*6:500 800:(400*500)

645000*6:500=3870000:500=7740800:(400*500)=800:200000=0.004

645000*6:500=7740645000*6=38700003870000:500=7740800:(400*500)= 0.004400*500= 200000800:200000=0.004