Teacher Li brought 200 yuan to buy prizes, bought 28 notebooks at 2.5 yuan each, and pens at 6.5 yuan each. How many pens can I buy with the remaining money?
李老师带了200元钱买奖品，每本2.5元的本子买了28本，钢笔每支6.5元，余下的钱能买多少支钢笔？
<gadget id="calculator">2.5 * 28</gadget>
<output>70</output>

<gadget id="calculator">200 - 70</gadget>
<output>130</output>

<gadget id="calculator">130 / 6.5</gadget>
<output>20</output>

<result>20</result>