Number get from list is unavailable for calculation

MIT App Inventor Help
1

Hi there,
How do we get number from lists in order to calculate.
the error message is as the followings,

The operation >= cannot accept the arguments: , ["1953"], [["645"]]
Note: You will not see another error reported for 5 seconds.

Number 645 can not be used for calculation, because it is from a list.

list structure is as the following example
[["明応"], ["めいおう"], ["1492"], ["1501"], ["10"]]

SuzukiS

2

This looks like what you get when you try to convert a single column CSV file into a table.

Single column CSV is best converted using a text split at \n block.