Answer:
900
Step-by-step explanation:
you just see if by the number, if the number is 6 and up your round over and it would become 950 but the number is lower so you make it 900.
2,6,18
r = 6/2 = 3
18 *3 = 54
54*3 = 162
162*3=486
Answer: 54,162,486