Fix java.lang.ArithmeticException: divide by zero in visnkmr.apps.timenetspeed.MainActivity$k.onClick

### Version 1.2G5i(16) ###


### Stacktrace ###


### Reason ###


java.lang.ArithmeticException: divide by zero


### Link to App Center ###


* [https://appcenter.ms/users/visnkmr/apps/Time-Netspeed/crashes/errors/1380616708u](https://appcenter.ms/users/visnkmr/apps/Time-Netspeed/crashes/errors/1380616708u)
