Initial rendering in react?

Question

React

Hello everyone!)
There is a code https://codepen.io/anon/pen/OaXgMO . Now, when the components are initially rendered, the second one inputdisplays the string [object Promise], however, I expect an empty string. How to make it so that a string is displayed there, and when entering numbers in the first one input, the doubled entered first value is displayed in the second?

Answer 1

like this https://codepen.io/anon/pen/KrMXPW
don't know how long anonymous pen live