A certain toy has to go through two processes. The first process makes 12 pieces per person per hour, and the second process makes 16 pieces per person per hour. The minimum number of people in each process should be arranged to make the production sequence flow.
某种玩具要经过二道工序，第一道工序每人每小时做12件，第二道工序每人每小时做16件，各道工序最少应安排多少人才能使生产顺序流水进行．
<gadget id="calculator">2 * 2 * 3 * 2 * 2</gadget>
<output>48</output>

<gadget id="calculator">48 / 12</gadget>
<output>4</output>

<gadget id="calculator">48 / 16</gadget>
<output>3</output>

<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<result>7</result>