How many three-digit numbers are divisible by 12 and 18 but not divisible by 15 and 16?
能被12和18整除，但不能被15和16整除的三位数共有多少个．
<gadget id="calculator">900 / 36</gadget>
<output>25</output>

<gadget id="calculator">900 / 180</gadget>
<output>5</output>

<gadget id="calculator">25 - 5 - 6</gadget>
<output>14</output>

<gadget id="calculator">14 + 1</gadget>
<output>15</output>

<result>15</result>