There are 28 identical bookshelves in the library. Each bookshelf has 6 floors, and the number of books on each floor is the same. It is said that when the first book and the last book were removed from a shelf, there were 20 books left on that floor. How many books are on the shelves in the library?
20 2 [OP_ADD] 6 [OP_MUL] 28 [OP_MUL]
var_a = 20
var_b = 2
var_c = var_a + var_b
var_d = 6
var_e = var_c * var_d
var_f = 28
var_g = var_e * var_f
print(int(var_g))