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

### Instruction:
Mary wants to ride the world's tallest roller coaster, Kingda Ka. The minimum height to ride the roller coaster is 140 cm. Mary's brother is 180 cm, Mary is 2/3 the height of her brother. How many more centimeters does Mary need to grow to ride Kingda Ka?

### Response:
 Kwa kuwa ana urefu wa 2/3 ya urefu wa kaka yake, Mary ana urefu wa 180 * 2/3 = <<180*2/3=120>>120 cm.
Ili afikie urefu wa chini na aweze kupanda Kingda Ka, Mary anahitaji kuongeza sentimita 140 - 120 = <<140-120=20>>20 cm.