Since the Australian Cockroach measures 3.586 centimeters, and the American Cockroach measures 3.576, we should pay attention to the numbers being told.
3.586 and 3.576 have 3 in their thousands.
3.586 and 3.576 also have 5 in their hundreds.
In the tens, the eight is larger than the seven.
3.586 > 3.576
(I hoped this helped!)