1234567898**2-1234567897*1234567899.
1234567898**2-1234567897*1234567899．
<gadget id="calculator">1_234_567_898 ** 2</gadget>
<output>1_524_157_894_772_138_404</output>

<gadget id="calculator">1_234_567_897 * 1_234_567_899</gadget>
<output>1_524_157_894_772_138_403</output>

<gadget id="calculator">1_524_157_894_772_138_404 - 1_524_157_894_772_138_403</gadget>
<output>1</output>

<result>1</result>