Voluntary blood donation is generally 200 milliliters of blood each time, a total of 50 people donate blood in a day, how many liters of blood donation is the total.
义务献血每次献血量一般为200毫升，某一天中共有50人献血，献血量共是多少升．
<gadget id="calculator">200 * 50</gadget>
<output>10_000</output>

<gadget id="calculator">10_000 / 1_000</gadget>
<output>10</output>

<result>10</result>