987654321*1235-987654322*1234.
987654321*1235-987654322*1234．
<gadget id="calculator">987_654_321 * 1_235</gadget>
<output>1_219_753_086_435</output>

<gadget id="calculator">987_654_322 * 1_234</gadget>
<output>1_218_765_433_348</output>

<gadget id="calculator">1_219_753_086_435 - 1_218_765_433_348</gadget>
<output>987_653_087</output>

<result>987_653_087</result>