The thickness of 50 sheets of paper is 0.5 cm. If 1.3 billion people save one piece of paper each, what is the height of the 1.3 billion sheets of paper in meters?
50张纸的厚度是0.5厘米，如果13亿人每人节约一张纸，13亿张纸摞起来的高度是多少米．
<gadget id="calculator">0.5 / 50</gadget>
<output>0.01</output>

<gadget id="calculator">1_300_000_000 / 100</gadget>
<output>13_000_000</output>

<gadget id="calculator">0.01 * 13_000_000</gadget>
<output>130_000</output>

<result>130_000</result>