The total cost of printing the school album is 2,240 yuan. The printing fee for the album is 3.6 yuan, and the rest is 800 yuan. How many picture books did the school print?
学校印制画册一共用去2240元，画册的印刷费是3.6元本，其余费用是800元．学校印制了多少本画册？
<gadget id="calculator">2_240 - 800</gadget>
<output>1_440</output>

<gadget id="calculator">1_440 / 3.6</gadget>
<output>400</output>

<result>400</result>