A number (6/7) is 60, what is this number.
一个数的(6/7)是60，这个数是多少．
<gadget id="calculator">6 / 7</gadget>
<output>6/7 = around 0.857143</output>

<gadget id="calculator">60 / (6/7)</gadget>
<output>70</output>

<result>70</result>