Master Li can process 24 parts per hour. He goes to work at 8:00 and leaves at 11:00. How many parts has Master Li processed in total?
李师傅每小时能加工24个零件，8：00上班，11：00下班，李师傅一共加工了多少个零件？
<gadget id="calculator">11 - 8</gadget>
<output>3</output>

<gadget id="calculator">24 * 3</gadget>
<output>72</output>

<result>72</result>