奇妙的得数(一)
7×9=63
77×99=7623
777×999=776223
7777×9999=77762223
77777×99999=7777622223
777777×999999=777776222223
7777777×9999999=77777762222223
77777777×99999999=7777777622222223
777777777×999999999=777777776222222223
7×9=63
77×99=7623
777×999=776223
7777×9999=77762223
77777×99999=7777622223
777777×999999=777776222223
7777777×9999999=77777762222223
77777777×99999999=7777777622222223
777777777×999999999=777777776222222223