If: 5¤2=5+55, 7¤3=7+77+777, calculated according to this rule, 4¤4=how much.
如果：5¤2=5+55，7¤3=7+77+777，按此规定计算，4¤4=多少．
<gadget id="calculator">4 + 44 + 444 + 4_444</gadget>
<output>4_936</output>

<result>4_936</result>