There are 28 identical bookshelves in the library. Each bookshelf has 6 floors, and the number of books on each floor is the same. An English book is placed 9th from the left and 11th from the right on one floor of a bookshelf. How many books are on the shelves in the library?
9 11 [OP_ADD] 1 [OP_SUB] 6 [OP_MUL] 28 [OP_MUL]
var_a = 9
var_b = 11
var_c = var_a + var_b
var_d = 1
var_e = var_c - var_d
var_f = 6
var_g = var_e * var_f
var_h = 28
var_i = var_g * var_h
print(int(var_i))