The school held a "good book sharing" book donation activity. The number of comic books donated was 1/5 of the number of science books, and the ratio of the number of science books to the number of story books was 2:1. It is known that there are 120 comic books donated. How many books are there in total?
学校举行"好书分享"捐书活动，捐得的连环画册的本数是科技书的(1/5)，科技书的本数与故事书的本数比是2：1．已知捐得的连环画册有120本，三种书共有多少本？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">120 / (1/5)</gadget>
<output>600</output>

<gadget id="calculator">1 / 2</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">600 * (1/2)</gadget>
<output>300</output>

<gadget id="calculator">600 + 300 + 120</gadget>
<output>1_020</output>

<result>1_020</result>