Recycled paper is made from waste paper, and the quality of recycled paper is about (4/5) that of waste paper. In 2010, my country's paper consumption was about 70 million tons. If 3/10 of it was recycled, how many tons of recycled paper could be made?
再生纸就是以废纸为原料加工制成的，再生纸质量约为废纸原料质量的(4/5)．2010年我国的纸张消费量约为7000万吨，如果回收利用其中的(3/10)，可以制成多少万吨再生纸？
<gadget id="calculator">3 / 10</gadget>
<output>3/10 = around 0.3</output>

<gadget id="calculator">4 / 5</gadget>
<output>4/5 = around 0.8</output>

<gadget id="calculator">7_000 * (3/10) * (4/5)</gadget>
<output>1_680</output>

<result>1_680</result>