(1/5) of 35 is 5 less than (3/7) of a number, what is this number?
35的(1/5)比一个数的(3/7)少5，这个数是多少？
<gadget id="calculator">1 / 5</gadget>
<output>1/5 = around 0.2</output>

<gadget id="calculator">35 * (1/5)</gadget>
<output>7</output>

<gadget id="calculator">7 + 5</gadget>
<output>12</output>

<gadget id="calculator">3 / 7</gadget>
<output>3/7 = around 0.428571</output>

<gadget id="calculator">12 / (3/7)</gadget>
<output>28</output>

<result>28</result>