The product symbol means a for-loop. You just changed your post to say you don't know what the Product symbol means - it means you have to do a loop, from the number on the bottom to the number on the top, because the index is used in the enclosed expression.
yea i did said that i dont know what the [] big sign means i just said that... never changed the meaning of that ... i changed the text where i was expressing myself to harsh maybe and making you think im telling u something that there isnt...
my point is in the capx above.. raising at ^ power is a expression in C2 the [] sign i dont know what it is probably is ceil but its probably not.
and times expression is there also which is * this means times something maybe we miss understood each other.
Edited: now i see what you where saying, the times() i used i missed on changing or remove it, its the * sign if you copy paste the formula from the page he gave, you get times() instead of * its just a typo lol.... miss understanding at its best. ha ha
edited2: here is the copy pasted data from the website shared originally directly from website using ctrl+c and ctrl+v to paste
\left \lceil 10\times(Level-1+1.55^{Level-1})\times [isBoss\times 10] \right \rceil <--- hence the times ... i forgot to remove... not a big deal.
edited that is pi lol the product symbol just googled it... my math skills are rusty. also its pi sigma to use it properly which i dont think C2 has.