在某些值上没有输入if-else分支

I am have a little trouble with this java homework. I am still fairly new to this programming work. I am having trouble making the program do the following: Scientists measure an object’s mass in kilograms and its weight in Newtons. If you know the amount of mass that an object has, you can calculate its weight, in Newtons, with the following formula:I am have a little trouble with this java homew