The width of a rectangle is the greatest common factor of 13 and 39, and the length is the least common multiple of 6 and 8. What is the area of this rectangle?
一个长方形的宽是13与39的最大公因数，长是6与8的最小公倍数，这个长方形的面积是多少？
<gadget id="calculator">13 * 24</gadget>
<output>312</output>

<result>312</result>