_____ : 9 = 13800
_____ : 4 = 30476
_____ : 7 = 4100
_____ : 6 = 3840
_____ : 30 = 6270
_____ : 60 = 4380
_____ : 40 = 2029
_____ : 70 = 4308
528000 : 30 =
528 : 3 =
52800 : 176 =
176 * (30*100) =
( 1760 * 10 ) * 3 =
30 * 176 =
4 1/2*2/3=6/2км=3км