A number (3/5) is 3 more than its (4/7), what is this number?
一个数的(3/5)比它的(4/7)多3，这个数是多少？
<gadget id="calculator">3 / 5</gadget>
<output>3/5 = around 0.6</output>

<gadget id="calculator">4 / 7</gadget>
<output>4/7 = around 0.571429</output>

<gadget id="calculator">(3/5) - (4/7)</gadget>
<output>1/35 = around 0.028571</output>

<gadget id="calculator">3 / (1/35)</gadget>
<output>105</output>

<result>105</result>