A playground is in the shape of a square with sides measuring 12 meters (m). The time it took for Seoyoon to walk around the playground was the same as the time it took for Seoyoon to walk around the 9 meters (m) rectangular playground. If you walk at the same speed, what is the vertical length of the rectangular playground in meters (m)?
12 4 [OP_MUL] 2 [OP_DIV] 9 [OP_SUB]
var_a = 12
var_b = 4
var_c = var_a * var_b
var_d = 2
var_e = var_c / var_d
var_f = 9
var_g = var_e - var_f
print(int(var_g))