2 既 800次方, 3既600次方, 5既400次方, 6既200次方係咩

It is impossible to find the exact value,but if you want to know which 1 is greater,you can use this method:
2^800=(2^4)^200=16^200
3^600=(3^3)^200=27^200
5^400=(5^2)^200=25^200
6^200=6^200
so,3既600次方>5既400次方>2 既 800次方>6既200次方
addition info.(calculate by calculater):
2既800次方=6.6680144328798542740798517907213e+240
3既600次方=1.8739277038847939886754019920358e+286
5既400次方=3.8725919148493182728180306332864e+279
6既200次方=4.2682522381202740079697489151877e+155
(actually, I don't think you will understand this...)
PS:By the way,what is the original form of the question?

1.640000
2.216000000
3.10240000000000
4.64000000000000

6既200次方=1.5365708057232986428691096094676+157個0(posimation..)
5既400次方=1.5127312167380149503195432161275+285個0(posimation..)

2的800次方是：
6.6680144328798542740798517907213e+240
3的600次方是：
1.8739277038847939886754019920358e+286
5的400次方是：
3.8725919148493182728180306332864e+279
6的200次方是：
4.2682522381202740079697489151877e+155