The length of a rectangle is three times its width, and its width is 19 cm. What is the area of this rectangle?
一个长方形的长是宽的3倍，宽是19厘米，这个长方形的面积是多少？
<gadget id="calculator">19 * 3</gadget>
<output>57</output>

<gadget id="calculator">57 * 19</gadget>
<output>1_083</output>

<result>1_083</result>