Students A and B start counting chess pieces at the same time. When A counts 7 pieces, B counts 5 pieces. When B counts to 55 pieces, he forgets the number he counted, and continues to count the rest of the pieces from 1 until the number reaches 55. When there are 135 chess pieces, the total number of chess pieces is counted.
甲、乙二位同学同时开始数棋子，甲数7个时，乙数5个，现乙数至55个时，忘记了自己所数的数，又从1开始继续数其余的棋子，数至135个时，棋子数完，求棋子的总数．
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">55 / (5/7)</gadget>
<output>77</output>

<gadget id="calculator">77 + 135</gadget>
<output>212</output>

<result>212</result>