Hope primary school students spent 40.25 yuan on repairing tables and chairs, which was 3.7 yuan more than binding books. How much did it cost to bind the book?
希望小学的同学们修理桌椅花了40.25元，比装订图书多花了3.7元．装订图书花了多少元？
<gadget id="calculator">40.25 - 3.7</gadget>
<output>36.55</output>

<result>36.55</result>