Among the natural numbers from 1 to 1998, what is the number of numbers that are divisible by 37, but neither by 2 nor by 3?
在从1到1998的自然数中，能被37整除，但不能被2整除，也不能被3整除的数的个数等于多少．
<gadget id="calculator">1_998 / 37</gadget>
<output>54</output>

<gadget id="calculator">1_998 / 37 / 2</gadget>
<output>27</output>

<gadget id="calculator">1_998 / 37 / 3</gadget>
<output>18</output>

<gadget id="calculator">1_998 / 37 / 6</gadget>
<output>9</output>

<gadget id="calculator">18 - 9</gadget>
<output>9</output>

<gadget id="calculator">27 + 9</gadget>
<output>36</output>

<gadget id="calculator">54 - 36</gadget>
<output>18</output>

<result>18</result>