The largest number among five consecutive even numbers is 248, what is the average of these five numbers?
五个连续偶数中最大数是248，那么这五个数的平均数是多少．
<gadget id="calculator">248 - 2</gadget>
<output>246</output>

<gadget id="calculator">248 - 2 - 2</gadget>
<output>244</output>

<gadget id="calculator">248 - 2 - 2 - 2</gadget>
<output>242</output>

<gadget id="calculator">248 - 2 - 2 - 2 - 2</gadget>
<output>240</output>

<gadget id="calculator">248 + 246 + 244 + 242 + 240</gadget>
<output>1_220</output>

<gadget id="calculator">1_220 / 5</gadget>
<output>244</output>

<result>244</result>