The garment factory processed a batch of school uniforms for the school. The original plan was to process 9 sets per day, which took 16 days to complete. Actually process 8 sets per day, how many days to finish?
服装厂为学校加工一批校服，原计划每天加工9套，16天完成．实际每天加工8套，几天完成？
<gadget id="calculator">16 / 8</gadget>
<output>2</output>

<gadget id="calculator">9 * 2</gadget>
<output>18</output>

<result>18</result>