Xiaohua spent 50 yuan in pocket money this month, which is 2/7 less than last month. How much pocket money was shared last month?
小华这个月共用去50元零花钱，比上个月节约了(2/7)，上个月共用去多少零花钱？
<gadget id="calculator">2 / 7</gadget>
<output>2/7 = around 0.285714</output>

<gadget id="calculator">1 - (2/7)</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">50 / (5/7)</gadget>
<output>70</output>

<result>70</result>