After the final exam, the teacher bought a pen as a prize for each of the 9 outstanding students. The price of each pen was 16 yuan. How much did the teacher spend on the prizes?
期末考试后，老师给9名优秀学生每人买一支钢笔作为奖品，每支钢笔的价格是16元，老师买奖品一共花了多少钱？
<gadget id="calculator">16 * 9</gadget>
<output>144</output>

<result>144</result>