19931993*1993-19931992*1992-19931992.
19931993*1993-19931992*1992-19931992．
<gadget id="calculator">19_931_993 * 1_993</gadget>
<output>39_724_462_049</output>

<gadget id="calculator">19_931_992 * 1_992</gadget>
<output>39_704_528_064</output>

<gadget id="calculator">39_724_462_049 - 39_704_528_064 - 19_931_992</gadget>
<output>1_993</output>

<result>1_993</result>