B= 2009122+2010812
=40365631744 + 40433568561
=80799200305
=(2009 x 102+12)+(2010 x 102+81)
=((2009 x102)2+2 x 2009x102x12 +122) + ((2010x102 + 2x 2010x102x81+ 812)
=(20090000 + 4821600 + 144) + (201000 +32562000 +6561)
=24371744+32769561
=57141305