There are 7 students, each student is assigned 9 red flags, and there are 12 left, how many red flags are there in total?
有7个同学，每个同学分到9面红旗，还剩12面，一共有多少面红旗．
<gadget id="calculator">9 * 7</gadget>
<output>63</output>

<gadget id="calculator">63 + 12</gadget>
<output>75</output>

<result>75</result>