"It's a small matter, but saving is a big thing." There are about 1.3 billion people in my country. If each person saves 10 grams of grain, how many tons of grain can the country save?
"点滴事小，节约事大"，我国约有13亿人，如果每人节约10克粮食，全国就可以节约多少吨粮食？
<gadget id="calculator">10 / 1_000_000</gadget>
<output>1/100_000 = around 0.00001</output>

<gadget id="calculator">13 * 100_000_000 * (1/100_000)</gadget>
<output>13_000</output>

<result>13_000</result>