There are 9 boys and 7 girls in the science and technology group. The number of people in the art group is twice that of the technology group. There are 128 people in the chorus group, how many times the number of people in the chorus group is that of the art group?
科技组有男生9人，女生7人．美术组的人数是科技组的2倍．合唱组有128人，合唱组的人数是美术组的几倍？
<gadget id="calculator">9 + 7</gadget>
<output>16</output>

<gadget id="calculator">16 * 2</gadget>
<output>32</output>

<gadget id="calculator">128 / 32</gadget>
<output>4</output>

<result>4</result>