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

### Instruction:
There are 30 students in the general study hall and twice as many students in the biology hall as there are in the general study hall. If the number of students in the math hall is 3/5 times as many as the combined total number of students in the general study hall and the biology hall combined,  calculate the total number of students in all the halls combined.

### Response:
 Idadi ya wanafunzi katika chumba cha biolojia ni mara mbili ya idadi ya wanafunzi katika chumba cha kusoma kwa ujumla, maana yake kuna wanafunzi 2*30 = <<2*30=60>>60 katika chumba cha biolojia.
Jumla ya wanafunzi katika chumba cha biolojia na chumba cha kusoma kwa ujumla ni 60+30 = <<60+30=90>>90.
Ikiwa idadi ya wanafunzi katika chumba cha hesabu ni 3/5 ya jumla ya wanafunzi katika chumba cha kusoma kwa ujumla na chumba cha biolojia, basi kuna wanafunzi 3/5*90=54 katika chumba cha hesabu.
Jumla ya wanafunzi katika vyumba vitatu ni 54+90 = <<54+90=144>>144.