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

### Instruction:
Daria wants to go to a concert by her favorite band. She wants to buy tickets for her and for three of her friends. One ticket cost is $90. How much money does Daria need to earn if she currently has only $189?

### Response:
 Daria anataka kununua tiketi kwa watu wanne, hivyo gharama itakuwa tiketi 4 * $90/tiketi = $<<4*90=360>>360.
Daria kwa sasa ana $189, hivyo anahitaji $360 - $189 = $<<360-189=171>>171 zaidi.