(123.456+234.561+345.612+456.123+561.234+612.345)÷7
=100+200+300+400+500+600+10+20+30+40+50+60+1+2+3+4+5+6+0.1+0.2+0.3+0.4+0.5+0.6+……+0.005+0.006)
=(2100+210+21+2.1+0.21+0.021)÷7
=300+30+3+0.3+0.03+0.003
=333.333