There are 7,200 science and technology books in the library in April, which is more than March (2/7). How many science and technology books are there in March?
图书馆四月份有科技书7200本，比三月份多(2/7)，三月份有科技书多少本？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 + (2/7)</gadget>
<output>9/7 = around 1.285714</output>

<gadget id="calculator">7_200 / (9/7)</gadget>
<output>5_600</output>

<result>5_600</result>