Add water to a bottle of 450ml disinfectant to make 1:50 disinfectant for tableware, how many liters of water do you need to add?
将一瓶450毫升的消毒液加水配制成1：50的餐饮具消毒水，需要加水多少升？
<gadget id="calculator">450 * 50</gadget>
<output>22_500</output>

<gadget id="calculator">22_500 / 1_000</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>