The store wholesaled 80 repeaters from the factory at 120 yuan each. The store paid the factory 10,000 yuan, how much should it get back?
商店从工厂批发了80台复读机，每台120元．商店付给工厂10000元，应找回多少元？
<gadget id="calculator">120 * 80</gadget>
<output>9_600</output>

<gadget id="calculator">10_000 - 9_600</gadget>
<output>400</output>

<result>400</result>