3 liters 50 milliliters = how many milliliters.
3升50毫升=多少毫升．
<gadget id="calculator">3 * 1_000</gadget>
<output>3_000</output>

<gadget id="calculator">3_000 + 50</gadget>
<output>3_050</output>

<result>3_050</result>