[tex]P_{P}= 3,13*10^{5} \ km^{2}\\P_{K} = 3,8*10^{7} \ km^{2}\\P_{Z} = 5,1*10^{8} \ km^{2}[/tex]
[tex]a)\\\\\frac{P_{K}}{P_{P}} = \frac{3,8*10{7}}{3,13*10^{5}} \approx1,2*10^{7-5} \approx 1,2*10^{2}\approx120[/tex]
[tex]b)\\\\\frac{P_{Z}}{P_{K}} = \frac{5,1*10^{8}}{3,8*10^{7}}\approx1,3*10^{8-7} \approx1,3*10 \approx13[/tex]