11*11=121, 111*111=12321, 1111*1111=1234321, 1111111*1111111=how much.
11*11=121，111*111=12321，1111*1111=1234321，1111111*1111111=多少．
<gadget id="calculator">1_111_111 * 1_111_111</gadget>
<output>1_234_567_654_321</output>

<result>1_234_567_654_321</result>