The brother and sister took a total of 200 yuan to the bookstore to buy books. When they got home, they found that the amount of money they had left was exactly the same. The elder brother said that he spent his own money (3/8), and the younger sister said that he spent his own money Count (7/12), so how much did my sister spend?
兄妹两人共带200元钱去书店买书，回家后发现两人剩下的钱数正好相等，哥哥说自己花去了自己钱数的(3/8)，妹妹说自己花去了自己钱数的(7/12)，那么妹妹花去了多少元．
<gadget id="calculator">8 + 12</gadget>
<output>20</output>

<gadget id="calculator">200 / 20</gadget>
<output>10</output>

<gadget id="calculator">7 / 12</gadget>
<output>7/12 = around 0.583333</output>

<gadget id="calculator">10 * 12 * (7/12)</gadget>
<output>70</output>

<result>70</result>