The dividend is 381 and the remainder is 21, what is the maximum quotient.
被除数是381，余数是21，那么商最大是多少．
<gadget id="calculator">381 - 21</gadget>
<output>360</output>

<gadget id="calculator">360 / 24</gadget>
<output>15</output>

<result>15</result>