Calculate how much 987654321*123456789-987654320*123456788=.
计算987654321*123456789-987654320*123456788=多少．
<gadget id="calculator">987_654_321 * 123_456_789</gadget>
<output>121_932_631_112_635_269</output>

<gadget id="calculator">987_654_320 * 123_456_788</gadget>
<output>121_932_630_001_524_160</output>

<gadget id="calculator">121_932_631_112_635_269 - 121_932_630_001_524_160</gadget>
<output>1_111_111_109</output>

<result>1_111_111_109</result>