If the length of the upper side is 6 centimeters (cm) shorter than the length of the lower side and the area of the trapezoid is 8 centimeters (cm) and the area is 72 cm (cm2), find the length of the upper side of the trapezoid.
72 2 [OP_MUL] 8 [OP_DIV] 6 [OP_SUB] 2 [OP_DIV]
var_a = 72
var_b = 2
var_c = var_a * var_b
var_d = 8
var_e = var_c / var_d
var_f = 6
var_g = var_e - var_f
var_h = 2
var_i = var_g / var_h
print(int(var_i))