The sum of two integers is 60, and their least common multiple is 273. What is the product of these two integers? How many
两个整数的和是60，它们的最小公倍数是273，则这两个整数的乘积是多少？多少
<gadget id="calculator">21 * 39</gadget>
<output>819</output>

<result>819</result>