The distance from Namjoon's house to the school is 1.2 kilometers (km). If Namjoon returned home and returned to school at the point of 0.3 kilometers (km), find how many kilometers (km) he walked more than usual, including the decimal point.
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)))