How many four - digit positive integers have their product of digits even?

数字之积为偶数的四位正整数共有多少个?

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Please enter your birth date, including a four - digit year.

请输入您的出生日期, 包含四位数字的年份.

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The year of birth must be a four - digit number. Please retype the year of birth.

出生年份必须是四位数字. 请重新键入出生年份.

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The four - digit padded filename is compatible with many image playback programs, for example, Maya's FCheck utility.

四位数填补文件名与许多图像播放纲要一致, 例如MAYA的FCheck工具.

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