I cant figure out why the division sign just isnt working. The println shows that the values im dividing are equal 3 and 9 or 4 and 10 but the resulting value is always 0. I'm trying to map a percentage to the gain of an audio player but i cant get the division function to work

1.   void go(int stampsNumber, int stampTotal_temp){
2.     vol= ((stampsNumber) / (stampTotal_temp)) * 100;
3.     println("the stamp number is " + stampsNumber);
4.     println("the stamp total is " + stampTotal_temp);
5.     println("the volume is " + vol);
6.     vol= map(vol, 0, 100,-80,13.97);
7.     println("finally volume is " + vol);
8.     music.setGain(vol);
9.     music.play();
   
10. }