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

### Instruction:
Mark started the day with 14 buttons. His friend Shane gave him 3 times that amount of buttons. Then his other friend Sam asked if he could have half of Mark’s buttons. How many buttons did Mark end up with?

### Response:
 Mark alianza siku na vifungo 14.
Shane alimpa 3 x 14 = <<3*14=42>>42 vifungo.
Kisha alimpa nusu yao kwa Sam, ambayo ilimwacha na vifungo 42/2 = <<42/2=21>>21.