Xinhua Printing Factory bound a kind of exercise book with a batch of paper. On the first day, 120 copies were bound, and 2/5 of the paper was left; on the second day, another 65 books were bound, and 1350 sheets of paper were left. How many pieces of paper were there in total?
新华印刷厂用一批纸装订一种练习本，第一天装订了120本，还剩下全部纸的(2/5)；第二天又装订了65本，还剩下1350张纸．这些纸原来一共有多少张？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">1 - (2/5)</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">120 / (3/5)</gadget>
<output>200</output>

<gadget id="calculator">200 - 120 - 65</gadget>
<output>15</output>

<gadget id="calculator">1_350 / 15</gadget>
<output>90</output>

<gadget id="calculator">90 * 200</gadget>
<output>18_000</output>

<result>18_000</result>