Each computer desk costs 120 yuan, and the school bought 32 of them. The deposit of 900 yuan has been paid, how much more yuan should be paid?
每张电脑桌是120元，学校一共买了32张．已付订金900元，还应再付多少元？
<gadget id="calculator">120 * 32</gadget>
<output>3_840</output>

<gadget id="calculator">3_840 - 900</gadget>
<output>2_940</output>

<result>2_940</result>