Yuna is 9 years old this year. Her father is 27 years older than Yuna and her grandfather is 23 years older than her father. How old is Yuna's grandfather this year?
9 27 [OP_ADD] 23 [OP_ADD]
var_a = 9
var_b = 27
var_c = var_a + var_b
var_d = 23
var_e = var_c + var_d
print(int(var_e))