While taking a math test, Jinyong misunderstood the question that required division by 9/4 as multiplied by 9/4, and submitted 18/5 as the answer. What is the correct answer to the problem that Jinyong solved incorrectly?
18/5 9/4 [OP_DIV] 9/4 [OP_DIV]
var_a = 3.6
var_b = 2.25
var_c = var_a / var_b
var_d = 2.25
var_e = var_c / var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))