I have 7850 kg/m3

and its included in the following calculation

1,35*gk

where gk is = 30*120*7.85*10^-6 * 9,82

Another calculation i have seen writes 7,85 * 10^-1

30*120= mm˛

7.85*10^-6 = kg/mm^3

9,82= N/kg

the answer To equation 1.35*gk= 0,375 N/mm

what actually drives me crazy is That i dont know how7850 kg/m3 is converted in this case

7850 kg/m3 becomes 7,85*10^-6 or *10^-1 and still gives same answer

could Someone explain To me thoroughly and show me how

thank you