A.\( 50\,\,000\,\,000 + 80\,\,000\,\,000 + 7\,\,000\,\,000 + 400\,\,000\)\( + 50\,\,000 + 6\,\,000 + 300 + 20 + 1\)
B.\( 500\,\,000\,\,000 + 80\,\,000\,\,000 + 7\,\,000\,\,000 + 400\,\,000\)\( + 50\,\,000 + 6\,\,000 + 300 + 20 + 1\)
C.\( 500\,\,000\,\,000 + 8\,\,000\,\,000 + 7\,\,000\,\,000 + 400\,\,000\)\( + 50\,\,000 + 6\,\,000 + 300 + 20 + 1\)
D.\( 500\,\,000\,\,000 + 80\,\,000\,\,000 + 7\,\,000\,\,000 + 40\,\,000\)\( + 50\,\,000 + 6\,\,000 + 300 + 20 + 1\)

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