A rectangular flower bed is 60m long, and its width is 13m less than its length. What is the area of this flower bed?
一块长方形花坛长60m，宽比长少13m，这块花坛的面积是多少？
<gadget id="calculator">60 - 13</gadget>
<output>47</output>

<gadget id="calculator">47 * 60</gadget>
<output>2_820</output>

<result>2_820</result>