Minyoung is 10 years old this year and her grandmother is 65 years old this year. How old was her grandmother when Minyoung was 7 years old?
65 10 7 [OP_SUB] [OP_SUB]
var_a = 65
var_b = 10
var_c = 7
var_d = var_b - var_c
var_e = var_a - var_d
print(int(var_e))