Paste code

#include <stdio.h>
#include <conio.h>

int main()
{
	int  soluong, dongia , tien , thue;
	printf("\nhay nhap vao so luong : ");
	scanf("%d",&soluong);
	printf("\nhay nhap vao don gia : ");
	scanf("%d",&dongia);

	tien = soluong * dongia;
	thue = 0.1 * tien;

	printf("\ntien = %d",tien);
	printf("\nthue = %d",thue);


   getch();
   return 0;

}