99999999乘以9999999999
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99999999乘以999999999999999999乘以999999999999999999乘以9999999999原式=（100000000-1）*（10000000000-1）=1000000
99999999乘以9999999999
99999999乘以9999999999
99999999乘以9999999999
原式=（100000000-1）*（10000000000-1）
=1000000000000000000-10000000000+1-100000000
=999999989900000001
999999989900000001
方法是打开桌面菜单-计算器
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625乘以625乘以625乘以8乘以8乘以8乘以8乘以2乘以2乘以2乘以2乘以2
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