a, b, c, d, e are five non-zero natural numbers, the average of which is 139. If the average of the three numbers a, b, and c is 127, and the average of the three numbers c, d, and e is 148, then what is c?
a，b，c，d，e为五个非0自然数，其平均数为139．若a，b，c三个数的平均数为127，c，d，e三个数的平均数为148，那么c为多少？
<gadget id="calculator">127 * 3</gadget>
<output>381</output>

<gadget id="calculator">148 * 3</gadget>
<output>444</output>

<gadget id="calculator">139 * 5</gadget>
<output>695</output>

<gadget id="calculator">444 - 695</gadget>
<output>-251</output>

<gadget id="calculator">381 + (-251)</gadget>
<output>130</output>

<result>130</result>