There are 100 little white rabbits living in the forest, and all the little white rabbits who don't like carrots like to eat cabbage. Among them, the number of little white rabbits who like to eat radish is twice the number of little white rabbits who like to eat cabbage, and the number of little white rabbits who don't like cabbage is three times the number of little white rabbits who don't like radish. How many of them are there? A little white rabbit loves both carrots and cabbage?
森林里住着100只小白兔，凡是不爱吃萝卜的小白兔都爱吃白菜．其中爱吃萝卜的小白兔数量是爱吃白菜的小白兔数量的2倍，而不爱吃白菜的小白兔数量是不爱吃萝卜的小白兔数量的3倍，它们当中有多少只小白兔既爱吃萝卜又爱吃白菜？
<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">300 - 100</gadget>
<output>200</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 - 1</gadget>
<output>5</output>

<gadget id="calculator">200 / 5</gadget>
<output>40</output>

<gadget id="calculator">2 * 40</gadget>
<output>80</output>

<gadget id="calculator">80 - 100</gadget>
<output>-20</output>

<gadget id="calculator">40 + (-20)</gadget>
<output>20</output>

<result>20</result>