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

### Instruction:
Ariella has $200 more in her son's saving account than Daniella has in her son's savings account. Ariella's account earns her simple interest at the rate of 10% per annum. If Daniella has $400, how much money will Arialla have after two years?

### Response:
 Ikiwa Ariella ana $200 zaidi katika akaunti ya akiba ya mtoto wake kuliko Daniella ana, basi ana $400 + $200 = $600
Ikiwa anapata faida ya 10% katika mwaka wa kwanza, akaunti yake ya akiba inaongezeka kwa 10/100 * $600 = $60
Katika mwaka wa pili, anapata faida ile ile, ambayo ni $60 + $60 = $120
Baada ya miaka miwili, akaunti ya akiba ya Ariella inaongezeka hadi $600 + $120 = $720