Namjoon walks 1.2 kilometers (km) from home to school. Today, Namjoon walked 0.3 kilometers (km), went back home, got things ready, and went to school. How many more kilometers (km) did Namjoon walk than usual today? Find the answer including decimal points.
1.2 0.3 2 [OP_MUL] [OP_ADD] 1.2 [OP_SUB]
var_a = 1.2
var_b = 0.3
var_c = 2
var_d = var_b * var_c
var_e = var_a + var_d
var_f = 1.2
var_g = var_e - var_f
print('{:.2f}'.format(round(var_g+1e-10,2)))