204:2=(200+4):2
=200:2+4:2
=100+2
=102
609:3=(600+9):3
=600:3+9:3
=200+3
=203
808:4=(800+8):4
=800:4+8:4
=200+2
=202
603:3=(600+3):3
=600:3+3:3
=200+1
=201
2004:2=(2000+4):2
=2000:2+4:2
=1000+2
=1002
6009:3=(6000+9):3
=6000:3+9:3
=2000+3
=2003
80808:4=(80000+800+8):4
=80000:4+800:4+8:4
=20000+200+2
=20202
40608:2=(40000+600+8):2
=40000:2+600:2+8:2
=20000+300+4
=20304
