The naughty weight is 35 kg, which is 5/7 of the mother's weight. How much is the mother's weight?
淘气的体重是35千克，是妈妈体重的(5/7)，妈妈的体重是多少千克？
<gadget id="calculator">5 / 7</gadget>
<output>5/7 = around 0.714286</output>

<gadget id="calculator">35 / (5/7)</gadget>
<output>49</output>

<result>49</result>