There are four different natural numbers, and their product is 23100. If these four natural numbers are grouped two by two, they can be divided into six different groups. If the sum of the difference (big reduction) between two numbers in each group is 18, what is the sum of these four natural numbers?
有四个互不相同的自然数，它们的积是23100，把这四个自然数按两个两个地分组，可分成互不相同六组．如果将每组两数之差(大减小)相加其和是18，那么这四个自然数之和是多少．
<gadget id="calculator">2 * 5</gadget>
<output>10</output>

<gadget id="calculator">2 * 7</gadget>
<output>14</output>

<gadget id="calculator">3 * 5</gadget>
<output>15</output>

<gadget id="calculator">10 + 11 + 14 + 15</gadget>
<output>50</output>

<result>50</result>