Among the natural numbers from 1 to 1000, how many numbers are not divisible by 5 or 7?
在1-1000的自然数中，不能被5或7整除的数共有多少个．
<gadget id="calculator">10_000 / 5</gadget>
<output>2_000</output>

<gadget id="calculator">1_428 - 285</gadget>
<output>1_143</output>

<gadget id="calculator">2_000 + 1_143</gadget>
<output>3_143</output>

<gadget id="calculator">10_000 - 3_143</gadget>
<output>6_857</output>

<result>6_857</result>