Express the natural number 30 as the sum of three prime numbers so that the product of these three prime numbers is the smallest. What is the smallest product?
将自然数30表示成三个质数之和，使得这三个质数的积最小，这个最小积是多少．
<gadget id="calculator">2 * 5 * 23</gadget>
<output>230</output>

<result>230</result>