Think of a Number

Figure out how many trailing zeroes are in 1000! 

I have 4 corners. I have 4 sides.

I have 2 long sides and 2 short sides.

Who I am?

If 

111 = 13

112 = 24

113 = 35

114 = 46

115 = 57

Then

116 = .....???

Can you solve it?

E + E + E = 15

E + C = 8

C + E + B = 10

B + C * J = ????