The volume of the medicine box of a nebulizer is 13L. If 650ml of medicine solution is sprayed out every minute, how many minutes will it take to spray a box of medicine solution.
一个喷雾器的药箱容积是13L，如果每分钟喷出药液650ml，喷完一箱药液需要用多少分钟．
<gadget id="calculator">13 * 1_000</gadget>
<output>13_000</output>

<gadget id="calculator">13_000 / 650</gadget>
<output>20</output>

<result>20</result>