If 500 sheets of white paper are stacked together, the thickness is 50 mm, so how many sheets of white paper are stacked together, and the thickness is 80 mm.
500张白纸堆在一起的厚度为50毫米，那么多少张白纸堆在一起的厚度为80毫米．
<gadget id="calculator">50 / 500</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">80 / (1/10)</gadget>
<output>800</output>

<result>800</result>