There are 9 fish in each fisherman's bucket, but only 3 of them are mackerel. If there are 27 mackerels in total, how many buckets are there?
27 3 [OP_MUL] 9 [OP_DIV]
var_a = 27
var_b = 3
var_c = var_a * var_b
var_d = 9
var_e = var_c / var_d
print(int(var_e))