There are three baskets A, B, and C, and the number of balls in the baskets is different; the balls contained in the three A baskets are equal to the balls contained in the four B baskets; the balls contained in the two B baskets are exactly equal to the balls contained in one C basket. Basket A holds 60 fewer pieces than Basket C. How many balls are in basket B?
甲、乙、丙三只筐，筐内装球数不等；三只甲筐装的球与四只乙筐装的球相等；两只乙筐装的球刚好等于一只丙筐装的球，甲筐比丙筐装的少60个．乙筐装球多少个？
<gadget id="calculator">2 / 1</gadget>
<output>2</output>

<gadget id="calculator">3 + 4 + 2</gadget>
<output>9</output>

<gadget id="calculator">3 / 9</gadget>
<output>1/3 = around 0.333333</output>

<gadget id="calculator">2 / 9</gadget>
<output>2/9 = around 0.222222</output>

<gadget id="calculator">(1/3) - (2/9)</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">60 / (1/9)</gadget>
<output>540</output>

<gadget id="calculator">4 / 9</gadget>
<output>4/9 = around 0.444444</output>

<gadget id="calculator">540 * (4/9)</gadget>
<output>240</output>

<result>240</result>