Changhee received an average score of 83.1 in ten subjects in the midterm exam this semester, and an average score of 84 in eight subjects in the final exam. What is Changhee's average score this semester?
10 83.1 [OP_MUL] 8 84 [OP_MUL] [OP_ADD] 10 8 [OP_ADD] [OP_DIV]
var_a = 10
var_b = 83.1
var_c = var_a * var_b
var_d = 8
var_e = 84
var_f = var_d * var_e
var_g = var_c + var_f
var_h = 10
var_i = 8
var_j = var_h + var_i
var_k = var_g / var_j
print('{:.2f}'.format(round(var_k+1e-10,2)))