1 cm2 = 10 minus 4 square meters.

1 km2 = 1000000 m2

1 cm2 = 10 minus 10 km2.

Method 1 cm = 10 negative quadratic meter = 10 negative quintic kilometer 1 square centimeter = 10 negative quartic meter = 10 negative square kilometer 1 cubic centimeter =/kloc-0.

(2) The negative eighth power of1/3000000 = (1/3) * 10 is about the negative ninth power of 3.3* 10.

(3) 30/15000000 = 0.2 *10 negative 6th power =2* 10 negative 7th power.

(4) (80/20000)/4000 = 80/8000000 =10 to the sixth power.