The school held a 100-meter race. Xiaobing took 17 seconds, 2 seconds faster than Xiaoqiang. How many seconds did Xiaoqiang take?
学校举行100米赛跑，小兵用了17秒，比小强快了2秒，小强用了多少秒？
<gadget id="calculator">17 + 2</gadget>
<output>19</output>

<result>19</result>