Below is an instruction that describes a task. Write a response that appropriately completes the request in Swahili. Please answer in Swahili.

### Instruction:
Lovely cuts her birthday cake into 12 equal pieces. Only one-fourth of the cake was eaten by her visitors and the rest were kept. How many slices of cake were kept?

### Response:
 Kwa kuwa kulikuwa na vipande 12, na robo tu ilikuliwa, basi 12 * (1/4) = <<12*(1/4)=3>>3 vipande vya keki vilikuliwa na wageni wa Lovely.
Hivyo, vipande 12 - 3 = <<12-3=9>>9 vya keki vilihifadhiwa.