Minji cleans the house for 0.6 hours every day. How many total hours did Minji spend cleaning the house in 3 weeks?
0.6 7 [OP_MUL] 3 [OP_MUL]
var_a = 0.6
var_b = 7
var_c = var_a * var_b
var_d = 3
var_e = var_c * var_d
print('{:.2f}'.format(round(var_e+1e-10,2)))