Uncle Zhang can draw 8 craft vases in one hour. How many vases like this can he paint when he goes to work from 8 o'clock to 11 o'clock?
张叔叔1小时可以画8个工艺花瓶．他从8时上班一直工作到11时，可以画多少个这样的花瓶？
<gadget id="calculator">11 - 8</gadget>
<output>3</output>

<gadget id="calculator">8 * 3</gadget>
<output>24</output>

<result>24</result>