C             Simplified C   MIPS Assembler
------------  ------------   --------------
int x = 5;    int x = 5;     x:  .word 5
int y = 3;    int y = 3;     y:  .word 3
int z;        int z;         z:  .space 4
              int t;         ...
                             lw  $t0, x
                             lw  $t1, y
z = 5*(x+y);   t = x+y;      add $t0, $t0, $t1
                             li  $t1, 5
               t = 5*t;      mul $t0, $t0, $t1
               z = t;        sw  $t0, z