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

### Instruction:
Marla has to spend 20 minutes driving one way to her son's school, then 70 minutes attending parent-teacher night, then the same amount of time driving home. How many minutes does Marla spend on this errand in total?

### Response:
 Kwanza, mara mbili muda wa Marla wa kuendesha gari kwa njia moja ili kupata muda wake wa kuendesha gari kwa jumla: dakika 20 * 2 = <<20*2=40>>40 dakika
Kisha ongeza muda wa kuendesha gari wa Marla na muda uliotumika kuhudhuria mkutano ili kupata muda wa jumla: dakika 40 + dakika 70 = <<40+70=110>>110 dakika