Divide 23 into the sum of several prime numbers. If you want to maximize the product of these prime numbers, what is the product?
把23拆成若干个质数之和，如果要使这些质数的积最大，积是多少？
<gadget id="calculator">3 ** 7</gadget>
<output>2_187</output>

<gadget id="calculator">2 * 2_187</gadget>
<output>4_374</output>

<result>4_374</result>