The sum of two prime numbers is 49. What is the product of these two numbers?
两个质数相加的和为49，这两个数的积是多少．
<gadget id="calculator">49 - 2</gadget>
<output>47</output>

<gadget id="calculator">47 * 2</gadget>
<output>94</output>

<result>94</result>