If two 8.5 centimeters (cm) wooden planks and two 7.8 centimeters (cm) wooden planks are connected so that the overlapping part is 5 millimeters (mm), calculate how many centimeters (cm) the overall length of the planks will be.
8.5 2 [OP_MUL] 7.8 2 [OP_MUL] [OP_ADD] 5 10 [OP_DIV] 3 [OP_MUL] [OP_SUB]
var_a = 8.5
var_b = 2
var_c = var_a * var_b
var_d = 7.8
var_e = 2
var_f = var_d * var_e
var_g = var_c + var_f
var_h = 5
var_i = 10
var_j = var_h / var_i
var_k = 3
var_l = var_j * var_k
var_m = var_g - var_l
print('{:.2f}'.format(round(var_m+1e-10,2)))