It is said that when steaming dumplings, they are steamed by placing them in a checkerboard arrangement, 3 horizontally and 3 vertically, on a plate. How many plates are needed to steam 18 dumplings?
18 3 [OP_DIV] 3 [OP_DIV]
var_a = 18
var_b = 3
var_c = var_a / var_b
var_d = 3
var_e = var_c / var_d
print(int(var_e))