What is (2/3) the difference between the smallest four-digit number and the smallest three-digit number.
最小的四位数与最小的三位数的差的(2/3)是多少．
<gadget id="calculator">1_000 - 100</gadget>
<output>900</output>

<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">900 * (2/3)</gadget>
<output>600</output>

<result>600</result>