The square is divided into 2 rectangles of equal size. If the sum of the lengths of the four sides of the divided rectangle is 42 centimeters (cm), how many centimeters (cm) is the side of the first square?
42 2 [OP_DIV] 2 1 [OP_ADD] [OP_DIV] 2 [OP_MUL]
var_a = 42
var_b = 2
var_c = var_a / var_b
var_d = 2
var_e = 1
var_f = var_d + var_e
var_g = var_c / var_f
var_h = 2
var_i = var_g * var_h
print(int(var_i))