https://mathweb.ru/allsystem.html?id=167027

Умножить 0FFFFFFFFFFFFFFF0FFFFFFFFFFFFFFF(16) на 0FFFFFFFFFFFFFFF0FFFFFFFFFFFFFFF(16) = 0FFFFFFFFFFFFFFE200000000000000C100000000000001E000000000000001 Столбиком

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Ответ: 0FFFFFFFFFFFFFFF0FFFFFFFFFFFFFFF₁₆ * 0FFFFFFFFFFFFFFF0FFFFFFFFFFFFFFF₁₆ = 0FFFFFFFFFFFFFFE200000000000000C100000000000001E000000000000001₁₆