 
 <prompt> ```Ariella get $200 pass wetin Daniella get for her son savings account. Ariella account dey give am simple interest of 10% per year. If Daniella get $400, how much money Ariella go get after two years?``` <response>: If Ariella get $200 pass Daniella for her pikin account, e mean say she get $400 + $200 = $600
If she dey earn 10% interest for di first year, her account go increase by 10/100 * $600 = $60
For di second year, she go still earn di same interest, wey be $60 + $60 = $120
The total amount wey dey Ariella account after two years na $600 + $120 = $720

The final answer: 720. 