The sum of two prime numbers is 99, what is the product of these two prime numbers?
两个质数之和是99，这两个质数之积是多少．
<gadget id="calculator">99 - 2</gadget>
<output>97</output>

<gadget id="calculator">2 * 97</gadget>
<output>194</output>

<result>194</result>