printing company printed 30,000 volumes of materials in May, which was 1/7 more than in April. How many volumes were printed in April?
某印刷公司五月份印刷资料30000册，比四月份多生产了(1/7)，四月份印刷资料多少册？
<gadget id="calculator">1 / 7</gadget>
<output>1/7 = around 0.142857</output>

<gadget id="calculator">1 + (1/7)</gadget>
<output>8/7 = around 1.142857</output>

<gadget id="calculator">30_000 / (8/7)</gadget>
<output>26_250</output>

<result>26_250</result>