Minji spends 0.6 hours cleaning her room every day. Find how many hours Minji spent cleaning her room 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)))