There are 150 white rabbits and gray rabbits on the grass, and the number of gray rabbits is exactly the number of white rabbits (2/3). How many white rabbits are there?
草地上有白兔和灰兔共150只，灰兔的只数正好是白兔的(2/3)．白兔有多少只？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 + (2/3)</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">150 / (5/3)</gadget>
<output>90</output>

<result>90</result>