A country has a total of 3 islands. Each island has 12 ships, and each ship has 24 crew members. Find the number of crew members working on all the islands in this country.
3 12 [OP_MUL] 24 [OP_MUL]
var_a = 3
var_b = 12
var_c = var_a * var_b
var_d = 24
var_e = var_c * var_d
print(int(var_e))