Can anyhow help me with an easy solution for this
2, 7, 36, 4, 14, 225, 6, 21, ?	Pick one:
A) 576
B) 476
C) 376
D) 276
E) 676
2, 7, 36, 4, 14, 225, 6, 21, ?     2+7= 
<gadget id="calculator">  2+7</gadget>
<output>9</output>
9 and   9-3= 
<gadget id="calculator">  9-3</gadget>
<output>6</output>
6 and 6^2=36   4+14= 
<gadget id="calculator">4+14</gadget>
<output>18</output>
18 and   18-3= 
<gadget id="calculator">  18-3</gadget>
<output>15</output>
15 and 15^2=225   6+21= 
<gadget id="calculator">6+21</gadget>
<output>27</output>
27 and   27-3= 
<gadget id="calculator">  27-3</gadget>
<output>24</output>
24 and 24^2=576   576NSWER:576
<result>A</result>
Can anyhow help me with an easy solution for this
2, 7, 36, 4, 14, 225, 6, 21, ?