What do you mean? Are you talking about math? Because I don’t see how this is a history question unless I’m not fully understanding it
Geography of China affected the development of the early civilization affect China greatly because "where it was located." China built on mountains and hills which greatly impacted them geography. Being in different locations giving you benefits for example better soil, more water, and harder for enemies to attack because being up a moutain they would have to climb in order to get too you. Some locations also didn't have good benefits for example harsher weather and not being able to get to other places but many benefits defensive, and agriculture wise.
Hope this helps.
147 is the circumference.
since the directions say to use 3 as pi, and we know that the radius is 7, we can say that
3 times 7^2 = A, which is 147
