Siwoo gave 3/10 of the cookies he had to his friend, and there are 12 cookies left. Find how much is 1/5 of the cookies Siwoo had at the beginning.
12 3/10 [OP_DIV] 1/5 [OP_MUL]
var_a = 12
var_b = 0.3
var_c = var_a / var_b
var_d = 0.2
var_e = var_c * var_d
print(int(var_e))