Among all the three-digit numbers, how many numbers are divisible by 3?
在所有的三位数中，能够被3整除的数共有多少个．
<gadget id="calculator">999 - 100</gadget>
<output>899</output>

<gadget id="calculator">899 + 1</gadget>
<output>900</output>

<gadget id="calculator">900 / 3</gadget>
<output>300</output>

<result>300</result>