.text
main:
									li $a0, 2
									li $a1, 5
									li $v0, 0

									jal power

power:
									addi $sp, $sp, -4
									sw $ra, 0($sp)

									blez $a1, power_end

									addi $a1, $a1, -1

									lw $ra, 0($sp)
									jr $ra

power_end:
									li $v0, 1
									syscall