In the formula 3*16-12/3+6, what is the smallest result that can be calculated after only parentheses are added.
在算式3*16-12/3+6中，只添小括号后，所能计算出的最小结果是多少．
<gadget id="calculator">16 - 12</gadget>
<output>4</output>

<gadget id="calculator">3 + 6</gadget>
<output>9</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">3 * (4/9)</gadget>
<output>4/3 = around 1.333333</output>

<result>4/3 = around 1.333333</result>