Answer:

Step-by-step explanation:
Circumference of a circle is equal to:




12*13*14*15*16 = 524160
Idk how to get this answer actually. It's just my first guess, and it happened to be right.
180 because 30/180 can be simplified to 1/6 by dividing both numerator and denominator by 30
5 because 5/30 can be simplified to 1/6 by dividing both numerator and denominator by 5