3,478 = (3 * 103) + (4 * 102) + (7 * 101) + (8 * 100)
3,478 = (3 * 1,000) + (4 * 100) + (7 * 10) + (8 * 1)
3,478 = 3,000 + 400 + 70 + 8
Expanded Form of 3,478
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