Friday Comes Before Thursday

Figure out how many trailing zeroes are in 1000! 

I have branches, but no fruit, trunk or leaves. 

What am I?

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 = .....???

My body is long. I am very healthy.

You can make juice from me. I wear an orange coat. 

I grow underground.

Who I am?