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

### Instruction:
 Joan anakusanya mawe. Katika mkusanyiko wake wa sampuli za mawe, alikuwa na nusu ya idadi ya vito kama madini jana. Leo, alikwenda kwenye safari ya kukusanya mawe na akapata sampuli 6 za madini zaidi. Ikiwa ana madini 48 sasa, anayo sampuli ngapi za vito?


### Response:
 Jana kabla ya safari yake ya kukusanya mawe, alikuwa na madini 48 - 6 = <<48-6=42>>42.
Ana (42 / 2) 21 sampuli za vito.