1234567*1234567-1234566*1234568=how many.
1234567*1234567-1234566*1234568=多少．
<gadget id="calculator">1_234_567 * 1_234_567</gadget>
<output>1_524_155_677_489</output>

<gadget id="calculator">1_234_566 * 1_234_568</gadget>
<output>1_524_155_677_488</output>

<gadget id="calculator">1_524_155_677_489 - 1_524_155_677_488</gadget>
<output>1</output>

<result>1</result>