Regulations: 4¤2=4+44, 3¤4=3+33+333+3333, then 2¤5=how much.
规定：4¤2=4+44，3¤4=3+33+333+3333，那么2¤5=多少．
<gadget id="calculator">2 + 22 + 222 + 2_222 + 22_222</gadget>
<output>24_690</output>

<result>24_690</result>