The school printed a batch of albums for a total of 1,740 yuan, of which the plate-making fee was 300 yuan, and the average printing cost of each album was 3.6 yuan. How many books are there in this batch?
学校印制一批画册一共用了1740元，其中制版费300元，平均每本画册白白印制费用是3.6元．这一批画册有多少本？
<gadget id="calculator">1_740 - 300</gadget>
<output>1_440</output>

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

<result>400</result>