Answer:
42300000
Step-by-step explanation:
Use known fact

Consider 1 square kilometer:

So, to find the answer, you have to multiply given number of square kilometers by 1000000:

GFC is 8. Use a tree of 88 and 48. 88= 2^3 x 11 or 2 x 2 x 2 x 11
48=2^4 x 3 or 2 x 2 x 2 x 2 x 3 see how many groups count as the number once and multiply and bam GFC. Hope I helped! (: