Answer:
its 18
Step-by-step explanation:
6x3=18
Well there is 450 millimeters in general and Naiahs glass hold 2 out of the five fifths of Stephens glass. so you have to do 450 divided by 5 which is 90. but that is only one fifth, you have to do 90 times two. so it would be 180 millimeters. 180/450.
Since 4 is not 5 or over, you simply remove it.
6.64 becomes 6.6.
