已知1.1*1.1=1.21 1.11*1.11=1.2321 1.111*1.111=1.234321 求2.2222*2.2222=?
问题描述：
已知1.1*1.1=1.21 1.11*1.11=1.2321 1.111*1.111=1.234321 求2.2222*2.2222=?
答
2.2222*2.2222
=2*1.1111*2*1.1111
=4*(1.1111*1.1111)
=4*1.23454321
=4.93817284