100 grains of rice weigh about 20 grams. According to this calculation, 10 million grains of rice weigh about 2000 kilograms, and 100 million grains of rice weigh about how many tons.
100粒大米约重20克，照这样计算，1千万粒大米大约重2000千克，1亿粒大米约重多少吨．
<gadget id="calculator">20 / 1_000 / 100</gadget>
<output>1/5_000 = around 0.0002</output>

<gadget id="calculator">1 * 1_000</gadget>
<output>1_000</output>

<gadget id="calculator">100_000_000 / 1_000</gadget>
<output>100_000</output>

<gadget id="calculator">(1/5_000) * 100_000</gadget>
<output>20</output>

<result>20</result>