The department store sold 3 boxes of vests, 20 pieces in each box, and 24 yuan each. How much did you sell in total?
百货商店卖出3箱背心，每箱20件，每件24元，一共卖了多少元？
<gadget id="calculator">20 * 3</gadget>
<output>60</output>

<gadget id="calculator">24 * 60</gadget>
<output>1_440</output>

<result>1_440</result>