0.625*0.625.0.625{共9个0.625}*8*8.*8{

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0.625*0.625.0.625{共9个0.625}*8*8.*8{共10个8}*2*2.2{共9个2}

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  • 0.625 = 5/8
    (5/8)^9 * 8^10 * 2^9
    = 5^9 * ((1/8)^9 * 8^9) * 2^3 * 2^9
    = 5^9 * 2^12
    = (5*2)^9 * 2^3
    = 8,000,000,000