11×22+0.22×3300+330×4.4
问题描述：
11×22+0.22×3300+330×4.4
答
设a=11
a*2a+2a/100x3a*100+3a*10*4a/10
=2a^2+6a^2+12a^a
=20a^2
=20(121)
=2420