Answer:
524,288
Explanation:
1. 8
2. 8 x 4 = 32
3. 32 x 4 = 128
4. 128 x 4 = 512
5. 512 x 4 = 2,048
6. 2,048 x 4 = 8,192
7. 8,192 x 4 = 32,768
8. 32,768 x 4 = 131,072
9. 131,072 x 4 = 524,288
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