How many natural numbers less than 2000 are divisible by neither 2 nor 3?
在小于2000的自然数中既不能被2整除又不能被3整除的数共有多少个．
<gadget id="calculator">2_000 - 1_000 - 666</gadget>
<output>334</output>

<gadget id="calculator">334 + 333</gadget>
<output>667</output>

<result>667</result>