Xiaohong has 41 yuan, and bought 3 pens at the stationery store, each of which costs 6 yuan. How much money is left?
小红有41元钱，在文具店买了3支钢笔，每支6元钱，还剩多少元？
<gadget id="calculator">3 * 6</gadget>
<output>18</output>

<gadget id="calculator">41 - 18</gadget>
<output>23</output>

<result>23</result>