If you divide a number by 1.2, subtract 22.5, multiply that number by 0.6, then add 10.5, you can get 30. Find out this number. 
30 10.5 [OP_SUB] 0.6 [OP_DIV] 22.5 [OP_ADD] 1.2 [OP_MUL]
var_a = 30
var_b = 10.5
var_c = var_a - var_b
var_d = 0.6
var_e = var_c / var_d
var_f = 22.5
var_g = var_e + var_f
var_h = 1.2
var_i = var_g * var_h
print(int(var_i))