Answer:
multiply
Step-by-step explanation:
you multiply both sides of the equation by 3
3 pairs since a hexagon has 6 sides
Step-by-step explanation:
245 it's simple because the 0000 don't really matter
In the left hand side, you're multiplying 7.8 by 
In the right hand side, you're multiplying again 7.8 by a mysterious number.
So, the unknown number must be 
Every number remains unchanged when multiplied by 1, so the answer is 3.6