A rectangle is 4 times as long as it is wide and has a diagonal of 17 cm. What is the area of this rectangle.
1个长方形，长是宽的4倍，且对角线的长度是17厘米．这个长方形的面积是多少．
<gadget id="calculator">4 * 17</gadget>
<output>68</output>

<result>68</result>