Potatoes were planted in 3/5 of Woojin's field, and sweet potatoes were planted in 2/3 of the remaining. What fraction of the whole is the unplanted part?
1 3/5 [OP_SUB] 1 2/3 [OP_SUB] [OP_MUL]
var_a = 1
var_b = 0.6
var_c = var_a - var_b
var_d = 1
var_e = 0.6666666666666666
var_f = var_d - var_e
var_g = var_c * var_f
print('{:.2f}'.format(round(var_g+1e-10,2)))