7 * 9 = 63
add four 0's from 700 and 900
630,000
20 x 18 x 5= 1,800
20 times 18 equals 360, then you mutiply 5 and get 1,800
Answer: Did you find an answer yet?? Lol
Step-by-step explanation:
2km=2000m
25m=25m
2500cm=25m
3000mm=3m
Hence the longest is 2km=2000m