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

### Instruction:
Ben has four boxes with ten basketball cards in each box. His mother gave him five boxes with eight baseball cards.  If he gives 58 cards to his classmates, how many cards does he has left?

### Response:
 Ben ana kadi 4 x 10 = <<4*10=40>>40 za mpira wa kikapu.
Mama yake alimpa kadi 5 x 8 = <<5*8=40>>40 za mpira wa baseball.
Hivyo, Ben ana jumla ya kadi 40 + 40 = <<40+40=80>>80.
Hivyo, Ben anabakiwa na kadi 80 - 58 = <<80-58=22>>22.