.text          # Text section of the program (as opposed to data).
      .globl main    # Make MAIN globl so you can refer to it in SPIM.
main:                # Program starts at MAIN.
      li    $2,  43
      li    $3, 812
      li    $4, 315

      li    $v0, 10  # Prepare to exit...
      syscall        #   ... Exit.